X 4 7x 0 July 8, 2019 16 32 64 128 X 4 7x 12 0 X 4 7x 3 0 X 4 7x 2 0 X 4 7x 18 0 X 4 7x 2 12 0 X 4 7x 2 18 0 X 4 7x 2 8 0 X 4 7x 2 6 0 X 2 7x 4 0 complete the square X 4 7x 2 10 0 X 4 7x 2 44 0 X 4 7x 2 144 0 X 4 7x 2 1 0 X 4 7x 2 30 0 X 4 7x 2 16 0