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/sci/ - Science & Math

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3063592 No.3063592 [Reply] [Original]

Factor:
x^2+15x+26

>> No.3063597

(x+13)(x+2)

>> No.3063609

>>3063597
/thread

>> No.3063615

>>3063609
Was that really neccessary?

>> No.3063614

>>3063597

Why did you do that.

These idiots are like cats. If you give them a bite, they'll never leave

>> No.3063627

>>3063614
What's worse is he'll never learn how to factor.

>> No.3063631

>>3063614
he has what he wants, he'll leave for today. that is enough.

>> No.3063637

(x+13)(x+2)

>> No.3063645
File: 3 KB, 127x110, zx5.jpg [View same] [iqdb] [saucenao] [google]
3063645

>>3063627
hmm, yes. better to teach him the method, than give him the answer i think.
here was to do:
if you are factoring a quadratic in the form x^2+bx+c
then the answer will be (x+p)(x+q)
where c = (pq) and b = (p+q)
so all i had to do was find 2 numbers that multiply together to make 26, and add together to make 15.
13 and 2 jumped straight into my mind...you can just keep trying all different combinations until you get one that works for both.

>> No.3063657

>>3063645
Shut the fuck up EK and stop bumping shit.

>> No.3063662

>>3063645

give a tard a fish and you feed him for a day.
teach a tard to fish and he still won't be able to fish.

>> No.3063671

okay so what's 12x^2 - 13x - 4?

>> No.3063679

<span class="math">\bf{4}\mathbb{CHAN~}\bf{/}\mathbb{SCI}\bf{/}\mathbb{~RULES:}[/spoiler]
<span class="math">\bf{1}\Rightarrow \bf{All~science~and~math~related~topics~welcome.}[/spoiler]
<span class="math">\bf{2}\Rightarrow \bf{Homework~threads~will~be~deleted,~and~the~poster~banned.}[/spoiler]
<span class="math">\bf{3}\Rightarrow \bf{No~"religion~vs.~science"~threads.}[/spoiler]
<span class="math">\mathbb{OP~WILL~BE~PERMANENTLY~BANNED.~THREAD~CLOSED.}[/spoiler]

>> No.3063697

>>3063671
there are more combinations if there is a value in front of the x^2.

(4x+1)(3x-4)

>> No.3063747
File: 8 KB, 614x460, horizontal cylinder.png [View same] [iqdb] [saucenao] [google]
3063747

>>3063697
how do I calculate the volume of water inside this tank if I only know the dimensions of the tank and the height of the water.

>> No.3063762

>>3063747
lengthXdefinitive integral of cross section from 0 to [whatever the height is]

>> No.3063771
File: 72 KB, 450x373, retard.jpg [View same] [iqdb] [saucenao] [google]
3063771

>>3063762
lol taking integrals for a trig problem

>> No.3063786

Isn't the verb to 'factorise'? Or at least that's what we get taught in New Zealand.

>> No.3063791

>>3063747
The fact that you are using calculus to find the volume of this very simple trig problem shows your lack of mathematical knowledge. I bet you take derivatives to find the maximum and minimum of parabolas too. Fucking AP calculus is the cancer killing math.

>> No.3063804

>>3063597
this is a shinning example of how liberals begin to ruin a country.

>> No.3063799

>>3063771
trig is for use with triangles. that container looks cylinder shaped to me.

>>3063786
yes

>> No.3063800

>>3063791
>>3063747
I believe this to be a troll.

>> No.3063822

>>3063804
what?
how?
...i was just helping out.

>> No.3063823

>>3063799
are you trolling or just stupid?

Any trig class worth a shit will teach trig using the unit CIRCLE.

I know you're pretending to be a woman but I find it hard to believe a woman as stupid as you exist.

>> No.3063829

>>3063791
why the hell wouldnt you use derivatives for that?

>> No.3063832

>>3063771
>>3063791
How would you solve that with trig?

>> No.3063833

>>3063829
lol she's trying to use integrals not derivatives you dummy.

>> No.3063842

>>3063833
>read post but not what post quoted
>look like an idiot

>> No.3063849

(x+13)(x+2)

>> No.3063856

>>3063849
just plain late

>> No.3063858 [DELETED] 

>>3063832
(arccos((r-x)/r)r^2-(r-x)(sqr(r^2-(r-x)^2))*L

r= radius of the tank
L=length of the tank
x=height of the water

your basically subtracting a triangle inside the area between the two radii then multiplying it by the length of the tank.

>> No.3063859

>>3063637
>>3063849
>people who re-post without lurking
>all my rage

>> No.3063862

(x+12)(x+3)

>> No.3063864

>>3063592
(1)(x^2+15x+26)

>> No.3063865
File: 28 KB, 400x400, 0901px-laughing-l.jpg [View same] [iqdb] [saucenao] [google]
3063865

>>3063859
>people who use calculus to solve trig problems

>> No.3063867

>>3063858
So you think it's better to use that bastard of a formula than it is to integrate? Forget that...

>> No.3063872
File: 2 KB, 126x101, srisly.jpg [View same] [iqdb] [saucenao] [google]
3063872

>>3063865
this is not a trig problem...

>> No.3063875

>>3063872
yes it is faggot

>> No.3063883

>>3063822
It's called enabling. When you solve people's problems for them they don't learn how to solve them on their own. Only later, after the fact, did you try a different approach and explain the method.

In a more extreme case it could be said that you have a savior complex as the most radical kind of liberal would.

>> No.3063892

>>3063883
>you are now aware that the funding fathers were liberals

>you are now aware that the father of capitalism was a liberal

>> No.3063896

>>3063892

>Funding fathers

>> No.3063900
File: 15 KB, 489x358, 13635649.jpg [View same] [iqdb] [saucenao] [google]
3063900

>>3063875
orly? okay then, i'd like you to solve this wiyh trig, please:
there is a cyclindrical shaped water container, the height of the full container is 16 cm (diameter of circular cross sectional area)
the container is 23 cm long (length of the cyclinder)
and the height the water reaches is 11 cm up the container.

1.find the volume of water in the container using trig.
or
2. stop trolling
3. GTFO

>> No.3063902

guyssss OP here again i tried EK method and got (2x+15)(((X^3)/3)+7.5x^2) what did i do wrong?

>> No.3063911

>>3063902
you are not OP, you are the faggot troll who is plaguing this thread...

>> No.3063927 [DELETED] 

>>3063900
>>3063900
(arccos((r-x)/r)r^2-(r-x)(sqr(r^2+(r-x)^2))*L

r= radius of the tank
L=length of the tank
x=height of the water

your basically subtracting a triangle inside the area between the two radii then multiplying it by the length of the tank.

The answer is 3467.58 cubic cm

>> No.3063941

>>3063911
why you so angry at OP's mistake EK?

>> No.3063942 [DELETED] 

>>3063927
prove I'm wrong EK.

LOL you can't

>> No.3063961 [DELETED] 

>>3063900

(arccos((r-x)/r)r^2-(r-x)(sqr(r^2-(r-x)^2))*L

r= radius of the tank
L=length of the tank
x=height of the water

your basically subtracting a triangle inside the area between the two radii then multiplying it by the length of the tank.

3467.6 cubic cm

>> No.3063957

>>3063942
lol his post got deleted..

>> No.3063979 [DELETED] 

>>3063961
prove I'm wrong EK

>> No.3063991

>>3063892
your interpretation of liberal and founding father doesn't excuse the fact/act of enabling a bunch of mathematical retards of /sci/ or a nation of spoiled lazy debtors.

Also kudos for assuming I'm a United States citizen.

>> No.3063995

>>3063900
(arccos((r-x)/r)r^2-(r-x)(sqr(r^2-(r-x)^2))*L

r= radius of the tank
L=length of the tank
x=height of the water

your basically subtracting a triangle inside the area between the two radii then multiplying it by the length of the tank.

use this formula to find the answer. match it with yours

>> No.3064005

>>3063991
If you're not from the US then you have no excuse for not knowing the proper definition of a liberal. Therefore you're a retard.

>> No.3064021

i did have a response but i accidently put it in the wrong thread. *facepalm*

anyhoo, the fact that you have used r when there is no need to use it at all. proves that you must be wrong. i am too lazy to actually do this properly (by intergration) to find out what the real answer is, but it will not be the same as your answer.

>> No.3064028

>>3064005
I didn't say I wasn't from the US. I was just pointing out that you're full of assumptions

>> No.3064039

>>3064021
the answer is 3389.7

and r is for radius you fucking idiot. The fact that you think trig only applies to triangles proves you're an retard and that you never learned trig properly.

>> No.3064072
File: 10 KB, 376x327, 13645646.jpg [View same] [iqdb] [saucenao] [google]
3064072

>>3064039
>3389.7
really? not 3467.6 cubic cm as you originally stated?
strange of you to change your answer
inconsistent troll is inconsistent...

>> No.3064137

>>3064072
I told you I had a sign wrong in the previous formula but I can assure you that the answer is 3389.7 and that the formula is (arccos((r-x)/r)r^2-(r-x)(sqr(r^2-(r-x)^2))*L

Here is further proof that I'm correct

http://mathforum.org/library/drmath/view/56455.html

its in the fifth post

he just simplified sqrt(r^2-(r-x)^2) into sqrt(2rx-x^2) he also uses h instead of x as a variable for height

>> No.3064163
File: 50 KB, 265x313, feynman.gif [View same] [iqdb] [saucenao] [google]
3064163

>>3064137
>mfw EK gets told

>> No.3064166
File: 10 KB, 404x342, 13635679.jpg [View same] [iqdb] [saucenao] [google]
3064166

>>3064137
the fuck?
is this actually legit?

i've never heard of this method.
i'm too sleepy to do this now, but tommorow, i'll work out this problem both by that method, and by integration (which i know works) and if the answers are the same, it must be legit.

>> No.3064190

>>3064166
of course its legit you retard. You got told by a Community College student/High School drop out. Remember (arccos((r-x)/r)r^2-(r-x)(sqr(r^2-(r-x)^2))*L=Volume of liquid inside a cylindrical tank.

Now GTFO bitch.

>> No.3064235

>>3064166
A zoologist thinks they can do math. How cute. Go back to jacking off to furries, and leave math to the real scientists.

>> No.3064244

>>3064072
who is her?

>> No.3064254

okay, after a bit of googling, it appears that this method probably works.
kinda pissed off i was never taught it...

>> No.3064263

>>3064244
I... mean she
I've seen this picture many times. is she some kind od scientist ir something?

>> No.3064264
File: 12 KB, 357x348, 1296282406759.jpg [View same] [iqdb] [saucenao] [google]
3064264

>>3064244
who, dis?

>> No.3064270

this is not correct

>> No.3064275
File: 64 KB, 500x461, 1304569203549.jpg [View same] [iqdb] [saucenao] [google]
3064275

55 posts and 9 image replies omitted. Click Reply to view.

>> No.3064282

>>3064254
Well, you ARE a retarded trip-fag. Your instructors didn't want to waste their breath on you.

>> No.3064283

>>3064264
yeap.
i've seen that face many times here on /sci/
is she a boxxy equivalent or is it just you posting it over n over?

>> No.3064287

>>3064254
I was never taught it either. I learned it my self thru self study. I haven't even took trig yet and still trolled you succesfully with this problem. I think you deserve to go to Community College much more than I do.

>> No.3064302

>>3064264
why the hell does she look different in every pic?
are they quadruplets?

>> No.3064323

>>3064190
I would like to see the actual proof of this

>> No.3064409

>>3064323
proof of what?the formula? The formula is only valid if the tank is horizontal and leveled.

http://mathforum.org/library/drmath/view/56455.html

I believe this guy explains it in the fifth post.

>> No.3064437

>>3064072
You're my favorite tripfag EK because you're so easy to troll.