X 0 2 4 6 July 8, 2019 16 32 64 128 X 0 2 4 6 y 0 3 6 9 X 0 2 4 6 8 0 x 2 6x 4 X 2 6x 4 0 quadratic formula X 2 6x 4 0 discriminant X 4 2 64 0 X 2 4 6 8 y 0 2 4 6 X 4 64x 2 0 X 4 6x 2 5 0 X 4 6x 2 27 0 X 4 6x 2 1 0 X 4 6x 2 7 0 X 4 6x 2 9 0 13 /(( x 4 2 6 = 0 X 4 6x 2 16 0