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Verified answer
|2x+1| ≥ |x-3|*kuadratkan kedua ruas*
(2x+1)² ≥ (x-3)²
4x² + 4x + 1 ≥ x² - 6x + 9
3x² + 10x - 8 ≥ 0
(x + 4)(3x - 2) ≥ 0
x = -4 dan x = 2/3
cek untuk
x = 0
(0+4)(3(0)-2) ... 0
(4)(-2) ... 0
-8 ≤ 0
*tidak memenuhi*
Jadi, Hpnya
= {x| x ≤ -4 dan x ≥ 2/3}