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/sci/ - Science & Math


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2407860 No.2407860 [Reply] [Original]

hey, idiot here, i was doing hw & reviewing for a quiz, cant remember how to do this & cant find it in the ch. can anyone help?

>> No.2407877

Find a common denominator, add like terms, solve.

>> No.2407907

the x+5 & x-1 cancel out the x^2-4x-5 right?

>> No.2408126

1) Factor denominator on the right side.
2) Multiply each of the terms on the left side by each others' denominator over denominator.
3) Add the two left terms into one.

>> No.2408185

the answer is 26

>> No.2408199

>use any method

type that shit into a ti89 and hit solve

>> No.2408233

>>2407907

Yeah...multiply both sides by 1..aka (x^2-4x-5)/(x^2-4x-5). This will clear out your denominators, solve for x.

>> No.2408432

x/(x+5) + 5/(x-1) = (31x-1)/(x^2+4x-5)

(x^2 - x +5x + 25)/(x^2+4x-5) = (31x-1)/(x^2+4x-5)

(x^2 - x +5x + 25) = (31x-1)

x^2 -32x +5x +26 = 0
x^2 -27x + 26 = 0

Using the quadratic formula [-b +- SQRT(b^2-4ac)]/2a

x = [27 +- SQRT(27^2 - 4*25)]/2
x = [27 +- SQRT(629)]/2
x = 26.0399, x=0.9601

>> No.2408455

>>implying I still use a ti-89 and haven't upgraded to a voyage 200 yet

I got 26 and 1 however I was doing the whole thing in my head

>> No.2408472

>Bunch of faggots that don't appreciate the LaTeX available to them:
<span class="math">\text{Go fuck yourselves you stupid underagedb&d faggots. Use fucking latex you lazy fucks.Seriously, if you can use facebook (which I'm sure you do) you can use LaTex, so fucking do it you annoying assholes)}[/spoiler]

>> No.2408573
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2408573

>>2408432

>> No.2408580

>>2407860
IF IN DOUBT FACTORISE