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san4es73 [151]
2 years ago
9

what is the greatest common factor (GCF) of the numerator and denominator of the rational expression below? 3x-15/x^2-x-20

Mathematics
1 answer:
zvonat [6]2 years ago
4 0

Answer: (x-5)

Step-by-step explanation:

The given expression : \frac{3x-15}{x^2-x-20} [Taking as common outside]

\text{Polynomial in numerator=}3x-15=3(x-5)

\text{Polynomial in denominator=} x^2-x-20\\\\=x^2-5x+4x-20\\=-x(x-5)+4(x-5)\\=(x-5)(x+4)

We can see that the greatest common factor (GCF) of the numerator and denominator of given the rational expression = (x-5)

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