Question

(998)^3 using identities​

Answer 1

Answer:

$(a - b) {}^{3} = {a}^{3} - {b}^{3} - 3ab(a - b)$

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Answer 2

Answer:

very easy.....

Step-by-step explanation:

$identity(a - b) {}^{3} = a {}^{3} - b {}^{3} - 3ab(a - b) \\ (1000 - 2) {}^{3} \\ = 1000 {}^{3} - (2) {}^{3} - 3(1000)(2)(1000 - 2) \\ 1000000000 - 8 - 6000(998) = 994011992$

....hope it will be helpful

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