SOLUTION: i need help with this problem x^2-81/x^2-x-20 / x^2-8x-9/x^2+8x+16

Question 325492: i need help with this problem x^2-81/x^2-x-20 / x^2-8x-9/x^2+8x+16
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

Start with the given expression.

Multiply the first fraction by the reciprocal of the second fraction .

Factor to get .

Factor to get .

Factor to get .

Factor to get .

Combine the fractions.

Highlight the common terms.

Cancel out the common terms.

Simplify.

FOIL.

So simplifies to .

In other words,

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