Greatest Common Factor
2b2 + 4b
2b(b+2)
9x2 - 25
(3x+5)(3x-5)
x2+4x+4
(x+2)(x+2)
3ab3 + 2a2b
ab(3b2+2a)
r2- 36s2
(r-6s)(r+6s)
x2-6x +8
(x-4)(x-2)
4x3y4 - 16xy
4xy(x2y2 -4)
25x2 - 1
(5x+1)(5x-1)
x2 - 14x - 49
(x-7)(x-7)
5a3 - 5a4
5a3(1-a)
100x2 - 169y2
(10x+13y)(10x-13y)
x2+4x-21
(x+7)(x-3)