Question

Q1. Expand the following using the identies
(2X+ 7y)2​

Answer 1

Step-by-step explanation:

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Answer 2

$\large\mapsto\boxed{ \sf \green{Answer}} \:$

(2x+7y)2 is of the form (a+b)2=a2+b2+2ab

where a=2x,b=7y

∴(2x+7y)2=(2x)2+(7y)2+2×2x×7y

=4x2+49y2+28xy