SOLUTION: I haven't taken algebra in many many years. I can't remember it! The problem says "Completely factor the expression: 16x^2-81y^2 Thank you for your help! Melissa

Algebra ->  Expressions-with-variables -> SOLUTION: I haven't taken algebra in many many years. I can't remember it! The problem says "Completely factor the expression: 16x^2-81y^2 Thank you for your help! Melissa      Log On


   

Question 698671: I haven't taken algebra in many many years. I can't remember it!
The problem says "Completely factor the expression: 16x^2-81y^2
Thank you for your help!
Melissa
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
16x^2-81y^2
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Difference of squares:
(4x)^2 - (9y)^2
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Factor:
= (4x-9y)(4x+9y)
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Cheers,
Stan H.
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