# SOLUTION: I need help with this problem please factor each expression y2-81

Algebra ->  -> SOLUTION: I need help with this problem please factor each expression y2-81       Log On

 Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations! Ad: Mathway solves algebra homework problems with step-by-step help!

 Click here to see ALL problems on Polynomials-and-rational-expressions Question 88224: I need help with this problem please factor each expression y2-81 Answer by jim_thompson5910(29613)   (Show Source): You can put this solution on YOUR website! Start with the given expression Let and . So we get this: Since , A can be solved for: Take the square root of both sides Since , B can be solved for: Take the square root of both sides Since we have a difference of squares, we can factor it like this: Now replace A and B Plug in and So the expression factors to Notice that if you foil the factored expression, you get the original expression. This verifies our answer.