SOLUTION: Hello, Would u pls, check my answer? Factor completely : 81x4 – 16 My answer : =(9x^2 + 4)(9x^2 – 4) I used the Difference of Squares. Thanks a lot, H.H

Algebra ->  Graphs -> SOLUTION: Hello, Would u pls, check my answer? Factor completely : 81x4 – 16 My answer : =(9x^2 + 4)(9x^2 – 4) I used the Difference of Squares. Thanks a lot, H.H      Log On


   

Question 604837: Hello,
Would u pls, check my answer?
Factor completely : 81x4 – 16
My answer : =(9x^2 + 4)(9x^2 – 4)
I used the Difference of Squares.
Thanks a lot,
H.H
Answer by alicealc(293) About Me  (Show Source):
You can put this solution on YOUR website!
yes, it's correct, but it's not complete yet
the complete factor will be:
(9x^2 + 4)(9x^2 – 4)
=(9x^2 + 4)(3x – 2)(3x + 2)