64x^2 + 16x + 1 = 0 (8x )(8x ) ( +1)( +1) (8x+1)(8x+1)=(8x+1)^2 Check: (8x+1)(8x+1) (8x)(8x) (8x)(1) (1)(8x) (1)(1) 64x^2 +8x +8x +1 64x^2 +16x +1