Solve the following.
$$\frac{((28.4)^2-(24.4)^2)}{(28.4-24.4))}$$​= ?

Correct option is C

Given:

​$$\frac{((28.4)^2-(24.4)^2)}{(28.4-24.4))}$$ 

Formula Used:

​$$a^2 -b^2=(a+b)(a-b)$$ 

Solution:

​$$\frac{((28.4)^2-(24.4)^2)}{(28.4-24.4))}$$

By using formula $$a^2 -b^2=(a+b)(a-b)$$

​​$$\frac{((28.4-24.4)(28.4+24.4)}{(28.4-24.4))}$$  =28.4+24.4=52.8​