X 2 6x 72 July 8, 2019 16 32 64 128 X 2 6x 72 0 X 2 6x 720 0 X 2 6x 72 0 factor X 2 6x 72 0 complete the square X 2 6x 72 factorise X 2 6x 72 complete the square X 4 6x 2 72 Y x 2 6x 72 Solve x 2 6x 72 X 3 7x 2 6x 72 X 3 6x 2 72x X 3 6x 2 12x 72 0 Tìm x biết 6x 2 72x 0 X 3 6x 2 12x 72