Which of the following is a factor of 3x3−2x2y−13xy2+10y3
A
x+y
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B
x−2y
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C
x+2y
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D
x−y
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Solution
The correct option is Bx−2y Let, p(x)=3x3−2x2y−13xy2+10y3 put x=2y in p(x) p(2y)=3(2y)3−2(2y)2y−13(2y)(y)2+10(y)3 =24y3−8y3−26y3+10y3 =34y3−34y3=0 Since, p(2y)=0 ∴x−2y is a factor of p(x) Option B is correct.