2 9 0 7 July 8, 2019 16 32 64 128 2 9 0 78 2 9 0 75 2 7x 9 0 9 2 3 3 0 7 2 7 9 0 5 7 2 9 * 0 05 1 9 0 7 2 6 0 9 7 2 1 2x 7 2 9 0 0 9 7 2 4 2x 2 7x 9 0 X 2 7x 9 0 2х 2 7х 9 0 2x 2 7x 9 0 quadratic formula 3x 2 7x 9 0