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Which factorisation of $x^{2} + 2 x - 15$ is correct?

Class 9Factor Theorem and FactorisationPolynomials

A $(x + 5) (x - 3)$
B $(x - 5) (x + 3)$
C $(x + 5) (x + 3)$
D $(x - 5) (x - 3)$

Step-by-Step Solution

We need numbers with sum 2 and product -15: that is 5 and -3. So

x^{2} + 2 x - 15 = (x + 5) (x - 3)

.

Answer: A)

(x + 5) (x - 3)

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