x2-8x+16 x2 -8x +16 (x )(x ) ( -4)( -4) (x-4)(x-4) Factor: (x-4)2 Check: (x-4)(x-4) (x)(x) (x)(-4) (-4)(x) (-4)(-4) x2 -4x -4x +16 x2-8x+16