# How do you factor  36m^2-132mn+121n^2?

Jun 29, 2018

I tried this:

#### Explanation:

This is the classic:

${\left(a - b\right)}^{2} = {a}^{2} - 2 a b + {b}^{2}$

where in your case we have:

$a = 6 m$ and $b = 11 n$

This can be factored as:

${\left(6 m - 11 n\right)}^{2}$