Question

Use change of base to rewrite the expressio: log7 25
I wrote:
7^x = 25
Is this correct?
Second question:
Simplify x^2-2x-15/(x-6)(x-3) * x^2-6/(x-5)
Any ideas or help?

Answer 1

change of base
\[\log_7(25)=\frac{\ln(25)}{\ln(7)}\] what you did was write it in equivalent exponential form

Answer 2

So what you wrote exactly would be the right answer?

Answer 3

no

Answer 4

question asks for change of base, but they didn't specify the base ( or if they did, i can't see it)

Answer 5

the first one, you are right.
second: