SOLUTION: ln(x^2) =ln(20-x)

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Question 437708: ln(x^2) =ln(20-x)
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
ln(x^2) = ln(20-x)
Same as
x^2 = 20-x
x^2 + x - 20 = 0
factors to
(x+5)(x-4) = 0
two solutions
x = -5
and
x = +4
:
:
Check x=-5 with a calc:
enter: ln((-5)^2) = 3.22
enter: ln(20-(-5)) = 3.22
:
Do the same with x=4