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Verified answer
√(2x + 5)² ≤ x + 3, squared(2x + 5)² ≤ (x + 3)²
2x + 5 ≤ ±√(x + 3)²
2x + 5 ≤ ±(x + 3)
untuk 2x + 5 ≤ x + 3 ---> x = -2
untuk 2x + 5 ≤ -(x + 3) ---> x = -8/3
hp = {-8/3 ≤ x ≤ -2}
|2x+5|≤x+3
-(x+3) ≤2x+5≤x+3
(i) -(x+3)≤2x+5
-x-3≤2x+5
-3x≤8
x≥-8/3
(ii) 2x+5≤x+3
x≤-2
Dari (i) dan (ii) didapat
hp :{ -8/3≤x≤-2}
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