It goes like this:
x(square root of 5x-1) - (square root of 5x-1)
They are like terms now. Is it something like this:
x - (square root of 5x-1) ?
Actually, what you're going to do is factor the out of the equation, what you do is:
1. Pull the out by adding parentheses around the entire equation and tacking a right before the first parenthesis:
2. Inside the parentheses, you divide each term by :
And with that, you are done.