3 2 x 2 45 July 8, 2019 16 32 64 128 Y x 3 3x 2 45x 2 Tìm x x 3 2 x 2 45 X 3 2 x2 45 5 2 x 3 2 )=- 45 4 Tìm x biết (x+3)^2 - x^2 = 45 2 2 x 45 9 3
