Question

How do I solve for x: square root of (x^2-16) = 7

What is the domain and range of f(x) = 2/(5-2x)

Answer 1

add 16 on both sides
take square root.

Answer 2

But it's already in square root. I have to get rid of that first. How do I do that?

Answer 3

where is the square root .. :/
u need to draw the question..