Final Answer
$-1$
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Step-by-step Solution
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1
Factor the trinomial $x^2+x-12$ finding two numbers that multiply to form $-12$ and added form $1$
$\begin{matrix}\left(-3\right)\left(4\right)=-12\\ \left(-3\right)+\left(4\right)=1\end{matrix}$
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$\begin{matrix}\left(-3\right)\left(4\right)=-12\\ \left(-3\right)+\left(4\right)=1\end{matrix}$
Learn how to solve problems step by step online. Find the limit (x)->(-4)lim((7x+28)/(x^2+x+-12)). Factor the trinomial x^2+x-12 finding two numbers that multiply to form -12 and added form 1. Thus. Factor the polynomial 7x+28 by it's greatest common factor (GCF): 7. Simplify the fraction \frac{7\left(x+4\right)}{\left(x-3\right)\left(x+4\right)} by x+4.
Final Answer
$-1$