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(x + 2) (x - 1) ≥ 0
x = -2 atau x = 1
garis bilangan:
uji x = 0 --> hasil - maka
++++++ - - - - - ++++++
-2 1
krna tanda ≥ maka penyelesaian yg +
hp : { x | x ≤ -2 atau x ≥ 1, x ∈ R} (A)
Semoga membantu ya :)