SOLUTION: Please help: factor completely 25a^2+64-80a

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Please help: factor completely 25a^2+64-80a      Log On


   

Question 191883: Please help:

factor completely 25a^2+64-80a
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Factor completely:
25a%5E2%2B64-80a Rewrite as:
25a%5E2-80a%2B64 Notice that the coefficient of a%5E2 is a perfect square: 25+=+5%5E2 and the constant term is a perfect square: 64+=+8%5E2, so try:
highlight%2825a%5E2-80a%2B64+=+%285a-8%29%285a-8%29%29 or highlight%28%285a-8%29%5E2%29