\(\frac{2x^2-3x-20}{x^2-16}\)
\(=\frac{2x^2-8x+5x-20}{\left(x-4\right)\left(x+4\right)}\)
\(=\frac{2x\left(x-4\right)+5\left(x-4\right)}{\left(x-4\right)\left(x+4\right)}\)
\(=\frac{\left(2x+5\right)\left(x-4\right)}{\left(x+4\right)\left(x-4\right)}\)
\(=\frac{2x+5}{x+4}\)
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