Question

help with this log?

Answer 1

\[\log_{4}x+\log_{4}(x-9)=3 \]

Answer 2

\[log_4[x\times(x-9)]=3\]
\[\implies4^3=(x^2-9x)\]
\[\implies x^2-9x-16=0\]

Answer 3

Now just solve this quadratic equation

Answer 4

using quadratic formula?

Answer 5

Thats up to you

Answer 6

But did you understand the steps?

Answer 7

well im still a little unsure of what you did with log

Answer 8

what is it that you didn't understand?