Answer:
The equivalent expression
Step-by-step explanation:
Assuming your expression is
, then we can use the power property of logarithm , which is
.
If we let a=15, b=2, and n=3
Then using the power property of logarithm will give us:

Using the power property of logarithm, the equivalent expression is 
I don't understand the question you are asking sorry.

notice the picture of the graph added here
low and behold, x = -17, y is 0, and x= 15, y is 0
the graph is touching the x-axis, an x-intercept
or so-called, a "solution"