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Question

When 2 is subtracted from p(x), we get a polynomial whose factors are (x+2) and (x+3). What is p(x) ?

A
x2+5x+8
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B
x2+5x+6
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C
x3+5x+8
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D
5x+8
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Solution

The correct option is A x2+5x+8
Given,
p(x)2=(x+2)(x+3)

We know,
(x+a)(x+b)=x2+(a+b)x+ab

(x+2)(x+3) = x2+(2+3)x+(2)(3)
x2+5x+6


p(x)2=x2+5x+6
p(x)=x2+5x+8

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