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Evaluate the following using suitable identities: (998)^3

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Evaluate the following using suitable identities:

(998)3

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(998)3= (1000 − 2)3

= (1000)3 − (2)3 − 3(1000) (2) (1000 − 2)

= 1000000000 − 8 − 6000(998)

= 1000000000 − 8 − 5988000

= 1000000000 − 5988008

= 994011992

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