x3+6x2y+11xy2+6y3 এর উৎপাদকে বিশ্লেষণ কোনটি? 

A (x+y)(x+3y)(x+5y)

B (x+y)(x+2y)(x+3y)

C (x+y)(x+4y)(x+3y)

D (x+y)(x-y)(x+2y) 

Solution

Correct Answer: Option B

x3+6x2y+11xy2+6y3 
= x3+x2y+5x2y+5xy2+6xy2+6y3 
= x2(x+y)+5xy(x+y)+6y2(x+y)
= (x+y)(x2+5xy+6y2)
= (x+y)(x2+3xy+2xy+6y2)
= (x+y)(x+(x+3y)+2y(x+3y))
= (x+y)(x+2y)(x+3y)

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