# How do you simplify (p-1)^2?

##### 1 Answer
Feb 4, 2015

We use the general formula ${\left(a + b\right)}^{2} = {a}^{2} + 2 a b + {b}^{2}$, so ${\left(p - 1\right)}^{2} = {p}^{2} - 2 p + 1$