Question

evaluate the following using the special identities: 998×998​

Answer 1

Answer:

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

Answer 2

Answer:

(1000-2)(1000-2)

=(1000)^2+(2)^2-2 (1000)(2)

=1000000+4-4000

=996000+4

=996004

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