Final Answer
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Factor the polynomial $x^2+4x$ by it's greatest common factor (GCF): $x$
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$\lim_{x\to-4}\left(\frac{x^2-16}{x\left(x+4\right)}\right)$
Learn how to solve limits by direct substitution problems step by step online. Find the limit (x)->(-4)lim((x^2-16)/(x^2+4x)). Factor the polynomial x^2+4x by it's greatest common factor (GCF): x. The difference of the squares of two terms, divided by the sum of the same terms, is equal to the difference of the terms. In other words: \displaystyle\frac{a^2-b^2}{a+b}=a-b.. Evaluate the limit \lim_{x\to-4}\left(\frac{x-4}{x}\right) by replacing all occurrences of x by -4. Subtract the values -4 and -4.