[ASK] Logarithmic Equation

Logarithms problems.

[ASK] Logarithmic Equation

Postby Monox D. I-Fly » Mon Sep 14, 2020 11:42 pm

A friend asked me how to solve this question:

[tex]log_2(x+2)+log_{(x-2)}4=3[/tex]

I said I had no idea because one is x + 2 and the other one is x - 2. If both are x + 2 or x - 2, I can do it. He said that if that's the case, even at his level he could solve it. This is what I've done so far regarding the question.

[tex]log_2(x+2)+log_{(x-2)}4=3[/tex]

[tex]\frac{log(x+2)}{log2}+\frac{log4}{log(x-2)}=3[/tex]

[tex]\frac{log(x+2)log(x-2)+log4log2}{log2log(x-2)}=3[/tex]

[tex]log(x+2)log(x-2)+2log^22=3log2log(x-2)[/tex]

[tex]log(x+2)log(x-2)-3log2log(x-2)=-2log^22[/tex]

[tex]log(x-2)(log(x+2)-3log2)=-2log^22[/tex]

What should I do from here? Or did I make some mistakes?
Monox D. I-Fly
 
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