Simplify question
PLEASE HELP!!
:)

Question

Simplify question 
PLEASE HELP!!
:)

kuoministers · Answer

I dont know what to do first :P

kuoministers · Answer

$$\frac{ x - y }{ y^2 + xy - 2x^2  }$$

hartnn · Answer

i would try to factor out x-y from denominator 
y^2+xy -x^2 -x^2
= (y^2-x^2) + (xy -x^2)
do u see a factor of x-y in both ??

hartnn · Answer

actually ,the factor is y-x in both, right ?

kuoministers · Answer

i dont see it in the demominator lol im but slow

kuoministers · Answer

bit*

hartnn · Answer

$a^2-b^2 =(a-b)(a+b)$
now ?

kuoministers · Answer

yea i get that

hartnn · Answer

then try to solve further...if u get stuck, i'll tell u next step...

kuoministers · Answer

should this be the next step?
(y + x)(y - x)+ x(y - x)

hartnn · Answer

exactly! good..
now factor out y-x from that...

kuoministers · Answer

would be (y - x)(y + 2x)

hartnn · Answer

yes.!

kuoministers · Answer

so the answer is $$\frac{ 1 }{ y + 2x }$$

hartnn · Answer

the numerator had x-y , not y-x
u need to write x-y = -(y-x)

kuoministers · Answer

oh yea :P my bad

$$\frac{ 1 }{ -y -2x }$$

kuoministers · Answer

hope this is right?

hartnn · Answer

absolutely.

hartnn · Answer

or -1/(y+2x)

kuoministers · Answer

ok thanks so much

hartnn · Answer

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