X 2 25 49 July 8, 2019 16 32 64 128 Solve x^2 + 10x + 25 =49 Tìm x 4x 2 20x 25 49 X 2 10x 25 49 X 2 49 y 2 25 1 X 2 14x 49 25 25 x 1 2 49
