Difference of squares
a2-4
(a-2)(a+2)
g2+g-6
(g+3)(g-2)
2x2+5x+3
(2x-1)(x+3)
b4-16
(b2-4)(b2+4)
x2+2x-8
(x+4)(x-2)
2y2+9y-5
(2y-1)(y+5)
x2-81y2
(x-9y)(x+9y
y2+2y+1
(y+1)(y+1)
(y+1)2
3c2+2c-16
(3c+8)(c-2)
9b2-100
(3b-10)(3b+10)
n2+9n+20
(n+5)(n+4)
9x2-19x+10
(x-1)(9x-10)
64m4-9n2
(8m2-3n)(8m2+3n)
m2-17y+72
(m-9)(m-8)
10k2+75k+35
5(2k+1)(k+7)