Question

using the identity (a-b)² ,find 999²​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

998001

Step-by-step explanation:

=999^2

=(1000 - 1)^2

Using identity, (a - b)^2 = a^2 + b^2 -2ab

=(1000 - 1)^2

=(1000)^2 + (1)^2 - 2(1000×1)

=1000000 + 1 - 2000

=1000001 - 2000

=998001