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aliina [53]
4 years ago
5

Which of the following is equal to the rational expression when X not equal -4 or 3?

Mathematics
1 answer:
guajiro [1.7K]4 years ago
7 0

Answer:

A

Step-by-step explanation:

Given

\frac{x^2-4x+3}{x^2+x-12}

Factorise the numerator and denominator

x² - 4x + 3 = (x - 1)(x - 3)

x² + x - 12 = (x + 4)(x - 3), thus

= \frac{(x-1)(x-3)}{(x+4)(x-3)} ← cancel (x - 3) on numerator/denominator

= \frac{x-1}{x+4} → A

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