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Question

x2+x(a+b)+ab is equal to


A

(x-a)(x+b)

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B

(x+a)(x+b)

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C

(b+a)(x+x)

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D

(x+ax+b)

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Solution

The correct option is B

(x+a)(x+b)


Multiply the terms. We get

(x+a)(x+b)=x2+bx+ax+ab=x2+x(a+b)+ab


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