Question

expand the following using appropriate identities (7-2√)



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Answer 1

Answer:

Answer

We know that the identity: (x+y)

2

=x

2

+y

2

+2xy.

Consider (2a+3)

2

and apply the above identity as follows:

Taking x=2a and y=3 in the above identity.

We get, (2a+3)

2

=2a

2

+3

2

+(2×2a×3)=4a

2

+9+12a

Hence, (2a+3)

2

=4a

2

+12a+9.