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Verified answer
|x² - 1| ≤ |-x + 1|(x² - 1)² - (-x + 1)² ≤ 0
((x² - 1) + (-x + 1))((x² - 1) - (-x + 1)) ≤ 0
(x² - x)(x² + x - 2) ≤ 0
x(x - 1)(x - 1)(x + 2) ≤ 0
Uji titik
______•_______•______•___
+++ ....(-2)...- - -.....(0).. ++....(1)... +++
Krn ≤ 0
Ambil daerah yg (-)
Nilai x yg memenuhi :
-2 ≤ x ≤ 0