Question

Expand the following using suitable identity (9y + 2 )2
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Answer 1

Identity=(a+b)*2 = a*2+b*2+2ab
So we will be putting values-
(9y+2)*2= (See in image)

Answer 2

Answer:

(9y +2)2

9y + 2 × 2

9y + 4

So, Answer is 9y + 4