Question

using identities and evaluate of 5.1 square​

Answer 1

Identity used:

(a+b)²=a²+b²+2ab

(5.1)² can be written as (5+0.1)² and then evaluate using above identity..

Hope this helps...

Answer 2

Answer:

26.1

Step-by-step explanation:

$5.1 ^{2}$

$5 ^{2} + 0.1 ^{2} + 2(5)(0.1)$

$25 + \frac{1}{10} + 2(5)( \frac{1}{10} )$

$25 + \frac{1}{10} + 1$

$\frac{250}{10} + \frac{1}{10} + \frac{10}{10}$

$\frac{261}{10} = \: 26.1$