SOLUTION: solve the equation log4(x+3)+log4(x-3)=2

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Question 165949: solve the equation log4(x+3)+log4(x-3)=2
Answer by oscargut(686) About Me  (Show Source):
You can put this solution on YOUR website!
log4%28x%2B3%29%2Blog4%28x-3%29=2
then
log4%28%28x%2B3%29%28x-3%29%29=2
then
%28x%2B3%29%28x-3%29=4%5E2
then
x%5E2-9=16
then
x%5E2=25
then
x=5or x=-5
but if x=-5 then log4(x+3) not exists
so solution is
x=5