$\"\"$

The expression is $\"\"$ .

To find the coefficients of the x-terms, the product of $\"\"$ or 28, and a sum of $\"\"$ .

The two coefficients must be $\"\"$ and $\"\"$ since $\"\"$ .

$\"\"$ (Substitute $\"\"$ x $\"\"$ x for $\"\"$ x)

Take out common factor.

$\"\"$

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