Solve: 25x2 − 36 = 0.
25x² - 36 = 0 25x² - 30x + 30x - 36 = 05x(5x) - 5x(6) + 6(5x) - 6(6) = 0 5x(5x - 6) + 6(5x - 6) = 0 (5x + 6)(5x - 6) = 0 5x + 6 = 0 or 5x - 6 = 0 - 6 - 6 + 6 + 6 5x = -6 5x = 6 5 5 5 5 x = -1.2 x = 1.2