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Yang harus diingat definisi nilai mutlak|x| = x, jika x ≥ 0
|x| = -x, jika x < 0
A . |x + 3| = (x + 3)
= x + 3
|x + 3| = -(x + 3)
= -x - 3
B. |x + 2| - 3 = (x + 2) - 3
= x + 2 - 3
= x - 1
|x + 2| - 3 = -(x + 2) - 3
= -x - 2 - 3
= -x - 5