The correct option is B 9604(98)^2 = nbsp;(100 2)^2. Using the identity, (a b)^2 = nbsp;(a)^2 2ab + (b)^2 (100 2)^2 = nbsp;(100)^2 2(100)(2) + ...

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Expansion of (a ± b)²

The value of ...

Question

The value of (98) $^{2}$ is______.

9764

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9604

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9984

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9804

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Solution

The correct option is B 9604
(98) $^{2}$ = (100 - 2) $^{2}$ .

Using the identity,

(a-b) $^{2}$ = (a) $^{2}$ - 2ab + (b) $^{2}$

(100 - 2) $^{2}$ = (100) $^{2}$ - 2(100)(2) + (2) $^{2}$ = 9604.

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