Asked by anna
steps to solve, please
ln (x+10) + ln ( x-5) =2 ln x
ln (x+10) + ln ( x-5) =2 ln x
Answers
Answered by
oobleck
ln (x+10) + ln ( x-5) =2 ln x
ln((x+10)(x-5)) = ln x^2
x^2+5x-50 = x^2
x = 10
check: ln20+ln5 = ln100 = 2ln10
ln((x+10)(x-5)) = ln x^2
x^2+5x-50 = x^2
x = 10
check: ln20+ln5 = ln100 = 2ln10
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