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1397 x 1397 = ?

11951609
21981709
318362619
42031719

Answer:- 1

Explanation:-

Solution:

\begin{aligned} 1397 \times 1397 \\ = {(1397)}^{2} \\ = {(1400 - 3)}^{2} \\ = {(1400)}^{2} + {(3)}^{2} - (2 \times 1400 \times 3) \\ = 1960000 + 9 - 8400 \\ = 1960009 - 8400 \\ = 1951609 \end{aligned}

$\eqalign{ & 1397 \times 1397 \cr & = {\left( {1397} \right)^2} \cr & = {\left( {1400 - 3} \right)^2} \cr & = {\left( {1400} \right)^2} + {\left( 3 \right)^2} - \left( {2 \times 1400 \times 3} \right) \cr & = 1960000 + 9 - 8400 \cr & = 1960009 - 8400 \cr & = 1951609 \cr}$

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", "dateCreated": "7/24/2019 10:09:12 AM", "author": { "@type": "Person", "name": "Nitin Sir" } }, "suggestedAnswer": { "@type": "Answer", "text": "

Solution:

\begin{aligned} 1397 \times 1397 \\ = {(1397)}^{2} \\ = {(1400 - 3)}^{2} \\ = {(1400)}^{2} + {(3)}^{2} - (2 \times 1400 \times 3) \\ = 1960000 + 9 - 8400 \\ = 1960009 - 8400 \\ = 1951609 \end{aligned}

$\eqalign{ & 1397 \times 1397 \cr & = {\left( {1397} \right)^2} \cr & = {\left( {1400 - 3} \right)^2} \cr & = {\left( {1400} \right)^2} + {\left( 3 \right)^2} - \left( {2 \times 1400 \times 3} \right) \cr & = 1960000 + 9 - 8400 \cr & = 1960009 - 8400 \cr & = 1951609 \cr}$ ", "dateCreated": "7/24/2019 10:09:12 AM" } }

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