X 2 2x 63 0 July 8, 2019 16 32 64 128 X 2 2x 63 0 quadratic formula X 2 2x 63 0 complete the square X 2 2x 63 0 factor X 2 2x 63 0 vertex X 4 2x 2 63 0 X 2 49 2 x 2 2x 63 2 0 Factorise x 2 2x 63 0 X 4 )- 2x 2 )- 63 ≤ 0
