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August 1, 2015

Homework Help: Math - Properties of Logarithm

Posted by Greg on Thursday, June 9, 2011 at 1:03am.

Can someone show how to this question.
Loga(x+3) + Loga(x-3) = 3

I don't know if I'm typing this correctly the a is the base.

So, I'm thinking,

Loga((x+3)(x-3)) = 3

(x+3)(x-3) = 3^a
x^2 - 9 = 3^a,
x^2 = 3^a + 9
x = sqrt(3^a + 9)


but now I'm stuck, I don't know how to proceed. I don't know if this is the answer...

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