x²+9x+18
5x²-xy+30xy-6y²
(x+6)(x+3)
4x²+8x+32
4(x²+2x +8)
(x+2)²-16
16x²+8xy+y²
(4x+y)²
(x-2)(x+6)
(5x-y)(x+6y)
