Question

Tentukan nilai x yg memenuhi
5 log (x+3) + 5 log (x-1)=1

Answer 1

Verified answer

5log(x+3)(x-1) = 5log5
x²-x+3x-3 = 5
x²+2x-3-5 = 0
x²+2x-8 = 0
(x+4)(x-2)
x=-4 atau x=2