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Question

Factorize :
x3+6x2y+12xy2+9y3

A
(x3y)(x2+3y2+3x)
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B
(x+3y)(x2+3y2+3xy)
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C
(xy)(x2+y2+3y)
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D
(x+4y)(x2+y2+xy)
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Solution

The correct option is B (x+3y)(x2+3y2+3xy)
x3+6x2y+12xy2+9y3
=x3+3x2y+3xy2+3x2y+9xy2+9y3
=x(x2+3xy+3y2)+3y(x2+3xy+3y2)
=(x+3y)(x2+3y2+3xy)

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