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Question

Find the product : (2x3y)(2x+3y)(4x2+9y2)

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Solution

As we know the formula (a+b)(a+b)= a2+b2
Similarly (ab)(a+b)=a2b2
So = (2x3y)(2x+3y) =(2x)2(3y)2
= 4x29y2 ... (eq1)
So = (4x29y2)(4x29y2) .. using (eq1)
= (4x2)2(9y2)2
= 16x481y4

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