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Question

If P(x)=1+5x15x & Q(x)=15x1+5x, then P(x)Q(x) will be

A
1
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B
125x21+25x2
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C
(1+5x)2(15x)2
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D
1+25x2125x2
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Solution

The correct option is C (1+5x)2(15x)2
Given, P(x)=1+5x15x
and Q(x)=15x1+5x

P(x)Q(x)=1+5x15x15x1+5x=(1+5x)(1+5x)(15x)(15x)=(1+5x)2(15x)2

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