X 9 )( 5x 2 )= 0 July 8, 2019 16 32 64 128 X 2 5x 9 0 complete the square X 2 5x 9 0 discriminant X 4 5x 2 9 0 X 3 5x 2 3x 9 0 X 1 )( 5x 9 2 3 x 5 0 X 3 5x 2 9 0 X 2 5x 9 0 quadratic formula X 4 )( 5x 9 )- x 2 16 0 X 2 5x + frac 9 4 = 0 X 0 2 5x 0 9 )= x 5 5x 9 )( 2x 3 )( x 4 2 0 5x 9 )( x 1 )- x x 2 )= 0 X 2 5x 6 0 lớp 9 X 2 xy 5x 4y 9 0
