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Question

If x2 and x1 are the only zeroes of the polynomial p(x), which of the following is a zero of the polynomial p(x)6?

A
1
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B
-4
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C
4
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D
2
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Solution

The correct option is C 4
x2 and x1 are the only factors of p(x)

p(x)=(x1)(x2)
p(x)=x22xx+2
p(x)=x23x+2

p(x)6
x23x+26
x23x4

Let q(x)=x23x4

From the options, we have 4 is a zero as q(x)
423(4)4=0

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