SOLUTION: PLEASE HELP ME FACTOR THE FOLLOWING POLYNOMIALS: 1. 9-x^2 2.4x^2 + 81 -36 3. 4y^2 + 16y + 16 I am totally confused with algebra period.

Question 200742: PLEASE HELP ME FACTOR THE FOLLOWING POLYNOMIALS:
1. 9-x^2
2.4x^2 + 81 -36
3. 4y^2 + 16y + 16
I am totally confused with algebra period.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
FOLLOWING POLYNOMIALS:
1. 9 - x^2
Note this is the difference of square, 9 and x^2 are perfect squares, so we can:
(3 + x)(3 - x); FOIL this to prove this to yourself
:
2.4x^2 + 81 -36
Do the math on the numbers and you have;
4x^2 + 45 is about all you can do with this
:
3. 4y^2 + 16y + 16
Note you can factor out 4 here, results
4(y^2 + 4x + 4)
This is a perfect square now
4(y + 2)(y + 2)
or
4(y + 2)^2
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