Answer
$\frac{3}{x+2}$
Work Step by Step
Both fractions have the same denominator:
$\frac{x-1}{x+2}-\frac{x-4}{x+2}=\frac{(x-1)-(x-4)}{x+2}=\frac{x-1-x+4}{x+2}=\frac{3}{x+2}$
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