Evaluate (98)^2

Given:

(98)<sup>2</sup>

Identity used is:

(a-b)<sup>2</sup>=a<sup>2</sup>-2ab+b<sup>2</sup>

(98)<sup>2</sup> = (100-2)<sup>2</sup>

=100<sup>2</sup>+2<sup>2</sup>-2×100×2

=10000+4-400

=9604

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