[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 207 KB, 484x380, ConfusedPatrick.png [View same] [iqdb] [saucenao] [google]
[ERROR] No.3769078 [Reply] [Original]

x = 1

(x+2)^2
(1+2)^2
(3)^2
9

or

(1+2)^2
1^2+2^2
5


which is it. Im retarded.

>> No.3769084

>>3769078

The first one. Powers don't distribute like addition and multiplication.

>> No.3769089

>>3769084
thanks bro.

I couldnt into simple algebra for a minute there.

>> No.3769119

Assume x = 1

(x+2)^2
Becomes
(1+2)^2
Brackets, Exponents, Dvision/Multiplication, Addition/Subtraction
BEDMAS

We do the inside of the brackets first:
(1+2)^2
(3)^2

Now we do exponents
Exponents basically just means the number is multiplying itself.
(3)^2 is the same thing as (3)(3)

Or 3x3.

Watch out for negative signs.

-(3)^2 is different than (-3)^2
The first gives you -9, the second gives you 9.
The first: -(3)(3)
The second: (-3)(-3)

>> No.3769121

>>3769119
When you see a negative sign outside brackets, like so: -(3)

It's the same thing as saying -1(3)

Or -1 x 3

>> No.3769122

(a+b) ^2 = a^2 + 2ab + b^2

come on bro you should know that....


(1+2)^2 = 1^2 + 2(1)(2) + 2^2 = 1+4+4= 9.