$\"\"$

The expression is $\"\"$ .

Simplify the expression.

$\"\"$ (Original expression)

$\"\"$ (Multiply the conjugates $\"\"$ is $\"\"$ )

$\"\"$ (Multiply)

FOIL method:

The product of two binomials is the sum of the products of the first terms, the outer terms, the inner terms and the last terms.

$\"\"$ (Foil method)

$\"\"$ (Multiply)

$\"\"$ (Substitute: $\"\"$ )

$\"\"$ (Add)

$\"\"$ (Simplify)

The simplified expression is $\"\"$ .

$\"\"$

$\"\"$ .