Simplify the rational expression.

3x + 12 / x² + 5x + 4

a. 12 / 4 - x

b. - 3/x+1

c. 3 / x - 1

d. 3 / x + 1

3(x + 4)/(x + 4)(x + 1)

Both the (x + 4) would cancel out since they divide by eachother.

You are left with 3/x + 1

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