Asked by Anonymous
solve the equation
2logx+log4=2
Can someone walk me through this
2logx+log4=2
Can someone walk me through this
Answers
Answered by
Reiny
use the rules of logs
2logx + log4 = 2
log(x^2) + log4 = 2
log (4x^2) = 2
4x^2 = 10^2
4x^2 = 100
x^2 = 25
x = ± 5, but we cannot take log(-5)
so x = 5
test my answer with your calculator
2logx + log4 = 2
log(x^2) + log4 = 2
log (4x^2) = 2
4x^2 = 10^2
4x^2 = 100
x^2 = 25
x = ± 5, but we cannot take log(-5)
so x = 5
test my answer with your calculator
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