Question

The value of (2.8 x 2.8 + 2 x 2.8 x 2.2 + 2.2 x 2.2) is :
(2.8 x 2.8 + 2 x 2.8 x 2.2 + 2.2 x 2.2) |
(i) 5
(ii) 25
(iii) 7.84
(iv) 4.84​

Answer 1

Given:

2.8 x 2.8 + 2 x 2.8 x 2.2 + 2.2 x 2.2

To find:

Evaluate the value of 2.8 x 2.8 + 2 x 2.8 x 2.2 + 2.2 x 2.2

Solution:

2.8 x 2.8 + 2 x 2.8 x 2.2 + 2.2 x 2.2

7.84 + 12.32 + 4.84

25

So, the answer is 25.

Questions for practice:

Q1) Evaluate: 13 + 4 × 25 - 6 / 3

Q2) Evaluate: (26 + 17) - 8 + 6 × 9

Q3) Evaluate: 2.32 + 23.55 * 12 / 3 - 16.34

Q4) Evaluate: 23 + {12(3 + 4 - 6) + (12 × 4 + 16)}