SOLUTION: Use the difference of two squares formula to factor. Be sure to factor out any common factor. Check 81x^2-1

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Use the difference of two squares formula to factor. Be sure to factor out any common factor. Check 81x^2-1      Log On


   

Question 481154: Use the difference of two squares formula to factor. Be sure to factor out any common factor. Check
81x^2-1
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
The difference of 2 squares is the sum * the difference
a%5E2+-+b%5E2+=+%28a%2Bb%29%2A%28a-b%29 sum * difference
81x%5E2+=+%289x%29%5E2