397 × 397+104 × 104+2 × 397 × 104= ? · ABC26GN0191
Subject: General Aptitude · Chapter: Number System
$397 \times 397+104 \times 104+2 \times 397 \times 104=$ ?
(a)250001
(b)251001
(c)260101
(d)261001
Answer
Explanation
Given Expression $=(397)^{2}+(104)^{2}+2 \times 397 \times 104$ $$\begin{aligned} & =(397+104)^{2}=(501)^{2}=(500+1)^{2} \\ & =(500)^{2}+1^{2}+2 \times 500 \times 1=250000+1+1000=251001 . \end{aligned}$$
Explanation as extracted from the printed page; notation may be imperfect.
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