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