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Question

a2+2ab+4b2 a perfect square trinomial


A

3

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B

2

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Solution

The correct option is B

2


(a2+2ab+4b2 = (a)2+a×2b+(2b)2

= x2+xy+y2 ( taking x=a and y=2b)

Since given trinomial cannot be expressed as x2+2xy+y2 , it is not a perfect square trinomial


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