Question

evalute using suitable identity 999 square-1​

Answer 1

Answer:

(1000-1)^2

Use identity (a-b)^2.

(1000)^2+(1)^2-2×1000×1.

1000000+1-2000.

Sum of 1000000 and one and then difference of sum by 2000.

Then the answer will be 998001.