$\"\"$

The expression is $\"\"$ .

Rewrite the expression $\"\"$ .

Factors of the numerator $\"\"$ .

To find two numbers, m and n, with the product of 1· 12 or 12 and the sum of 7.

The correct factors are 4 and 3.

$\"\"$ (Write the factors form)

$\"\"$ (Substitute m = 4, and n = 3)

$\"\"$ (Group terms with common factors)

$\"\"$ (Factor the GCF from each grouping terms)

$\"\"$ (Take out common factor $\"\"$ )

$\"\"$

Substitute $\"\"$ $\"\"$ .

$\"\"$

The simplified expression is $\"\"$ .