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Question

One of the factors of x2−2x−15 is _____.


A

x+3

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B

x-3

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C

x+5

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D

x - 15

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Solution

The correct option is A

x+3


The given expression is

x22x15

We have to split the middle term in such a way the sum is -2 and product is -15 , which can be done in following way

=x25x+3x15=x(x5)+3(x5)
=(x+3)(x5)

So, x+3 is one of the factors of the given expression.


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