# How do you factor the trinomial  25b^2 − 5b + 10?

$5 \left(5 {b}^{2} - b + 2\right)$
$25 {b}^{2} - 5 b + 10$
We can factor out $5$ out of $\left(25 {b}^{2}\right)$, $\left(5 b\right)$ and $\left(10\right)$, not $b$ because there's no $b$ to factor out of $\left(10\right)$
$5 \left(5 {b}^{2} - b + 2\right)$