$${\text{Evalute}}:\frac{{{{\left( {2.39} \right)}^2} - {{\left( {1.61} \right)}

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Question

$${\text{Evalute}}:\frac{{{{\left( {2.39} \right)}^2} - {{\left( {1.61} \right)}^2}}}{{2.39 - 1.61}}$$

Options:

A . 2

B . 4

C . 6

D . 8

Answer: Option B
$$\eqalign{
& \text{Let } a = 2.39 \text{ and } b = 1.61 \cr
& {\text{Given Expression}} \cr
& = \frac{{{a^2} - {b^2}}}{{a - b}} \cr
& = \frac{{\left( {a + b} \right)\left( {a - b} \right)}}{{ {a - b} }} \cr
& = {a + b} \cr
& = {2.39 + 1.61} \cr
& = 4 \cr} $$

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