0 x 2 2x 80 July 8, 2019 16 32 64 128 X 2 2x 80 0 complete the square X 2 2x 80 0 solve by factoring X 2 2x 80 0 factored X 2 2x 800 0 X^2 - 2x - 80 = 0 quadratic formula X 2 2x − 80 0 answer Factorise and solve x 2 2x 80 0 0 x 2 0 80 x 2 2 - 2 = 0