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Question

Which of the following is a factor of 3x3−2x2y−13xy2+10y3

A
x+y
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B
x2y
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C
x+2y
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D
xy
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Solution

The correct option is B x2y
Let, p(x)=3x32x2y13xy2+10y3
put x=2y in p(x)
p(2y)=3(2y)32(2y)2y13(2y)(y)2+10(y)3
=24y38y326y3+10y3
=34y334y3=0
Since, p(2y)=0
x2y is a factor of p(x)
Option B is correct.

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