x2 - 25
(x+5)(x-5)
Solve for x: 3x-7=11
x=6
4- 49y2
(2-7y)(2+7y)
9b2-100
(3b-10)(3b+10)
64u2-v2
(8u-v)(8u+v)
Find the GCF then factor: 80n4-125n2
5n2(4n+5)(4n-5)