1. ## I want explain

I want explain to me last two steps

2. Originally Posted by r-soy
I want explain to me last two steps
the process of changing $\frac{1}{\sqrt{2}}$ to $\frac{\sqrt{2}}{2}$ is a simple algebraic step called rationalizing the denomonator.

Algebra Help - How to Rationalize a Denominator

3. thnks skeeter