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Question Number 6111 by Kasih last updated on 14/Jun/16

log^2 x+logx^2 −3=0 , x=?

log2x+logx2−3=0,x=?

Answered by prakash jain last updated on 14/Jun/16

log x=u u^2 +2u−3=0⇒(u+3)(u−1)=0 ⇒u=−3 or u=1 log x=−3 or log x=1 x=10^(−3) or x=10^1

logx=uu2+2u−3=0⇒(u+3)(u−1)=0⇒u=−3oru=1logx=−3orlogx=1x=10−3orx=101

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