solve for x : log(x-1) + log(x+1) =11
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log(x-1) +log(x+1)=11
take log common
log(x-1)(x+1)=11
log x²-1=11
log x²-1=log 100000000000
so we got:
x²-1=100000000000
x²=100000000001
x=√100000000001
take log common
log(x-1)(x+1)=11
log x²-1=11
log x²-1=log 100000000000
so we got:
x²-1=100000000000
x²=100000000001
x=√100000000001
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