I need help with this math problem

1).

2).

Step-by-step explanation:

In this question we have to write the fractions in the factored form.

Rational expressions are and .

1).

Factored form of the denominator (x² - x - 12) = x² - 4x + 3x - 12

                                                                           = x(x - 4) + 3(x - 4)

                                                                           = (x + 3)(x - 4)

Therefore.

2).

Factored form of the denominator (x² - 16) = (x - 4)(x + 4)

[Since (a²- b²) = (a - b)(a + b)]

Therefore,