Question

The value of \(\frac{(2.39)^2 – (1.61)^2}{ 2.39 – 1.61 }\)is
1. 2
2. 4
3. 6
4. 8

Answer 1

Correct Answer - Option 2 : 4

Given 

The expression : \(\frac{(2.39)^2 – (1.61)^2}{ 2.39 – 1.61 }\)

Formula Used 

a² - b² = (a - b)(a + b)

Calculation 

\(\frac{(2.39)^2 – (1.61)^2}{ 2.39 – 1.61 }\) = (2.39 + 1.61)(2.39 - 1.61) ÷ (2.39 - 1.61) 

⇒ 2.39 + 1.61 = 4

∴ The required answer is 4