Question 914797
Number 2:


{{{log(5,(x+5)(x-5))=2}}}


Base is 5, log is 2, 


{{{5^2=(x+5)(x-5)}}}, domain can be all real numbers.
This is a quadratic equation and solving for x may give a greater and a lesser solution; just solve for x.


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Solving,
{{{x^2-25=25}}}
{{{x^2=50}}}
{{{x=0+-sqrt(50)=0+-sqrt(2*5*5)}}}
{{{highlight(x=0+- 5sqrt(2))}}}