$\"\"$

The expression is $\"\"$ .

Factors the numerator $\"\"$ .

$\"\"$

Exclude the values for which $\"\"$ , and the denominator cannot equal 0.

$\"\"$

Apply subtraction property of equality: If a = b then $\"\"$ .

$\"\"$

Then the value of z not equal $\"\"$ . $\"\"$

The solution is $\"\"$ , $\"\"$ .