# How do you factor the expression x^2-11x+28?

${x}^{2} - 11 x + 28 = \left(x - 7\right) \left(x - 4\right)$

#### Explanation:

The factors of 28 are as follows:

$1 , 28$ and
$2 , 14$ and
$7 , 4$

The best pair is $7 , 4$ because the sum is $11$.