Using Factoring 9-9y^4?

2 ⤊

Using factoring, not sure how to break down this equation. i know that the GCF is 9 so it becomes; 9(1)+(-1)(1y^4). What next?

2007-04-23 01:55:56 · 4 answers · asked by marctwoods 1 in Science & Mathematics ➔ Mathematics

9(1-y^4)
9(1-y^2)(1+y^2)
9(1-y)(1+y)(1+y^2)

2007-04-23 02:01:02 · answer #1 · answered by Dave aka Spider Monkey 7 · 1⤊ 0⤋

9 - 9y^4
= 9(1- y^4)
=9(1 + y^2)(1 - y^2)
=9(1 + y^2)(1 + y)(1 - y)

2007-04-27 08:23:38 · answer #2 · answered by billako 6 · 0⤊ 0⤋

9(1-y^4)
9(1+y^2)(1-y^2)
9(1+y^2)(1+y)(1-y)

2007-04-23 09:06:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋

9-9y^4
( 3-3y^2)^2
(3-3y^2)(3+3y^2)
may be............from the identity
(a-b)(a+b)=a^2-b^2

2007-04-23 09:06:39 · answer #4 · answered by anvesha 2 · 1⤊ 0⤋