^3log(x-1)+^3log(x+5)=^3log 7
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^3log(x-1)+^3log(x+5)=^3log 7
1 Jawaban
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1. Jawaban Riza190220
(x-1)(x+5) = 7
x*2 + 5x - x - 5 = 7
x*2 + 4x - 12 = 0
(x + 6)(x - 2) = 0
x = -6 √ x = 2
Nb : ^3log dicoret semua