81x^2 - 25 = 0(9x + 5)(9x - 5) = 0x = 5/9 or x = -5/9
9x^2 - x = 0x(9x - 1) = 0x = 0 or x = 1/9
4x^2 + 5x - 6 = 0(4x - 3)(x + 2) = 0x = 3/4 or x = -2
81x^2 - 25 = 0
(9x + 5)(9x - 5) = 0
x = 5/9 or x = -5/9
9x^2 - x = 0
x(9x - 1) = 0
x = 0 or x = 1/9
4x^2 + 5x - 6 = 0
(4x - 3)(x + 2) = 0
x = 3/4 or x = -2