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Question 1(ix)
Use a suitable identity to get each of the following products:
(x2+3y4)(x2+3y4)

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Solution

(x2+3y4)(x2+3y4)=(x2+3y4)2
=(x2)2+2×x2×3y4+(3y4)2[Using Identity (a+b)2=a2+2ab+b2]
=x24+34xy+916y2

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