Question

Rationalize the denominator and simplify. (pic below)

Answer 1

any help would be good,

Answer 2

kind of desperate,

Answer 3

We multiply the numerator and denominator by something...
Are you familiar with the Difference of Squares rule?

Answer 4

(a - b)(a + b) = ?

Answer 5

\[{a}^2 - b^2\] right? :)
So, we multiply numerator and denominator by a-b