Question

How do you simplify this rational expression? Y^2-81x^2/y-9x

Answer 1

here we have to reliazze that the top part is a difference of squares. After factoring it would look like this:

(y-9x)(y+9x)/(y-9x). The y-9x terms cancel and you are left with y+9x

Answer 2

you would just simply divide the (y^2-81x^2) by (y-9x) to get y+9x

Answer 3

(y-9x)(y+9x)
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y-9x
=y+9x