Question

Evaluate the following using identities
$5.9 {}^{2}$
. Pls answer with explanation

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Answer 1

Answer:

We know, (a+b)

2

=a

2

+b

2

+2ab.

Then,

(5.2)

2

=(5+0.2)

2

=5

2

+(0.2)

2

+2(5)(0.2)

=25+0.04+2(1)

=25+0.04+2

=27.04.