Berapakah hasil dari 2 log (x2-2x-6) = 1?
Matematika
kiikai28
Pertanyaan
Berapakah hasil dari 2 log (x2-2x-6) = 1?
2 Jawaban
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1. Jawaban khominghoo
²log(x²-2x-6) = ²log2¹
x² - 2x -6 = 2
x² - 2x -6 -2 = 0
x² - 2x -8 = 0
(x-4)(x+2) = 0
x-4 = 0
x = 4
x+2 = 0
x = -2
HP = {-2,4} -
2. Jawaban Anonyme
LogAritMa
²log (x² - 2x - 6) = 1
x² - 2x - 6 = 2
x² - 2x - 8 = 0
(x - 4)(x + 2) = 0
x = 4 atau x = -2
NiLai x yg memenuhi :
x = -2 dan x = 4