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Using identities, evaluate. 998^2

Q : 6 Using identities, evaluate.

(iv) $998^2$

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D Devendra Khairwa

Here we will the identity :

$998^2=(1000 - 2)^2 = 1000^2 - 2(1000)(2) + 2^2$

or $= 1000000 - 4000+ 4$

or $= 996004$

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