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Verified answer
Matematika WajibPertidaksamaan Mutlak X SMA
Pembahasan :
|3x + 2| > 5
(3x + 2)² > 5²
(3x + 2)² - 5² > 0
(3x + 2 + 5)(3x + 2 - 5) > 0
(3x + 7)(3x - 3) > 0
x < -7/3 atau x > 1
Hp : {x < -7/3 atau x > 1}
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|2x - 1| < 7
(2x - 1)² < 7²
(2x - 1)² - 7² < 0
(2x - 1 + 7)(2x - 1 - 7) < 0
(2x + 6)(2x - 8) < 0
-3 < x < 4
Hp : {-3 < x < 4}
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|x - 3| < 4
(x - 3)² < 4²
(x - 3)² - 4² < 0
(x - 3 + 4)(x - 3 - 4) < 0
(x + 1)(x - 7) < 0
-1 < x < 7
Hp : {-1 < x < 7}