Factor out of .

Factor out of .

Factor out of .

Factor out of .

Factor using the AC method.

Consider the form . Find a pair of integers whose product is and whose sum is . In this case, whose product is and whose sum is .

Write the factored form using these integers.

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Combine the numerators over the common denominator.

Subtract from .

Move the negative in front of the fraction.

Simplify (5r+15)/(r^2-5r-24)-6/(r-8)