$$\frac{{{{\left( {489 + 375} \right)}^2} - {{\left( {489 - 375} \right)}^2}}}{{\left( {489 \times 375} \right)}} = ?$$
A. 144
B. 864
C. 2
D. 4
E. None of these
Answer: Option D
Solution (By Examveda Team)
Given expression :$$ = \frac{{{{\left( {a + b} \right)}^2} - {{\left( {a - b} \right)}^2}}}{{ab}}$$ (where a = 489, b = 375)
$$\eqalign{ & = \frac{{4ab}}{{ab}} \cr & = 4 \cr} $$
This Question Belongs to Arithmetic Ability >> Number System
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