nilai x yang memenuhi persamaan persamaan berikut !a.|x+3|=8 b.|x+9|=-3 c.|2x-1|=13 d.|2x-3|=|-x| e.|3x+2|=6-4x

Jawaban: a. x = 5 dan x = -11 b. x = -12 dan x = -6 c. x = 7 dan x = -6 d. x = 3 dan x = 1 e. x = 4/7 dan x = 8 Penjelasan: a. |x+3| = 8, maka x + 3 = 8, x = 5 x + 3 = -8, x = -11 b. |x+9| = -3, maka x + 9 = -3, x = -12 x + 9 = 3, x = -6 c. |2x - 1| = 13, maka 2x - 1 = 13, 2x = 14, x = 7 2x - 1 = -13, 2x = -12, x = -6 d. |2x-3| = |-x| kuadratkan kedua sisi (2x-3)² = x² 4x² - 12x + 9 = x² 3x² - 12x + 9 = 0 dibagi 3 x² - 4x + 3 = 0 (x - 3)(x - 1) = 0 x = 3 dan x = 1 e. |3x + 2| = 6 - 4x, maka 3x + 2 = 6 - 4x, 7x = 4, x = 4/7 -3x - 2 = 6 - 4x, x = 8