((489+375)²-(489-375)²)/((489 × 375))= ? · ABC26GN0193

Subject: General Aptitude · Chapter: Number System

$\frac{(489+375)^{2}-(489-375)^{2}}{(489 \times 375)}=$ ?

(a)144

(b)864

(c)2

(d)4

(e)None of these

Answer

Answer (as printed): D

Explanation

Given Expression $$=\frac{(a+b)^{2}-(a-b)^{2}}{a b}(\text { where } a=489, b=375)=\frac{4 a b}{a b}=4$$

Explanation as extracted from the printed page; notation may be imperfect.

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