Tentukan hp dari a. | 2x-3 | = -3 b. | 2x-7 | = | 3x+1 |

a) (2x - 3)² = -3²
4x² - 12x + 9 = 9
4x² - 12x = 0
4x(x - 3) = 0
x = 0 dan x = 3
b) (2x - 7)² = (3x + 1)²
4x² - 28x + 49 = 9x² + 6x + 1
0 = 9x² - 4x² + 6x + 28x + 1 - 49
5x² + 34x - 48 = 0
(x + 8)(5x - 6) = 0
x = -8 dan x = 6/5