$\"\"$

The expression is $\"\"$ .

The general factor trinomial form is $\"\"$ .

In the above trinomial, $\"\"$ .

Since c is positive and b is negative, you need to find two negative factors with a sum of $\"\"$ and a product of 15.

$\"\"$

Apply the pattern form: $\"\"$ when $\"\"$ .

$\"\"$ because $\"\"$ . $\"\"$

The factor form of expression is $\"\"$ .