Question

using suitable identity evaluate the following number is 998square​

Answer 1

Step-by-step explanation:

998 = 1000 - 2

So 998^2 = (1000-2)^2

As (a-b)^2 = a^2 + b^2 - 2ab

We have 1000^2 = 2^2 - 2(2)(1000)

1000000 + 4 - 4000 = 996004

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Answer 2

Answer:

996004

Step-by-step explanation:

998² = (1000 - 2)²

= 1000000 + 4 - 2 (1000) (2)

= 996004