Question

Using appropriate identify find the value of : (4.9)²​

Answer 1

Step-by-step explanation:

Value of (4.9)

2

.

We can use (a+b)

2

=a

2

+b

2

+2ab

or (a−b)

2

=a

2

+b

2

−2ab

⇒(5−0.1)

2

=(4.9)

2

=5

2

+(0.1)

2

−2(5)(0.1)

=25+0.01−1

=24.01

hence, the answer is 24.01.