Question

using suitable identity evaluate the following
999^2​

Answer 1

Answer:

998001

Step-by-step explanation:

${999}^{2} \\ = {(1000 - 1)}^{2} \\ = {1000}^{2} + {1}^{2} - 2 \times 1000 \times 1 \\ = 1000000 + 1 - 2000 \\ = 998001$

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Answer 2

Answer:

(1000-1)^2

(1000)^2 +(1)^2 - (2)(1000)(1)

1000000 +1 -2000

1000001-2000

998001

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