# How do you factor 9x^2+30x+25?

${\left(3 x + 5\right)}^{2}$
This is a special product - a square of a binomial. So what you do first is to get the square root of the first term. You must get the square root of $9 {x}^{2}$ which is $3 x$. Then, you get the square root of 25 which is 5. Put them together but leave a space in the middle for the sign. Since the middle term is positive, we put a plus sign so the final answer is ${\left(3 x + 5\right)}^{2}$.