Question

Evaluate:- (99)^2 ..​

Answer 1

Step-by-step explanation:

(99)^2 = (100-1)^2

[use (a-b)^2 = a^2 + b^2 - 2ab]

(100-1)^2 = (100)^2 + (1)^2 -2(100)(1)

= 10000 + 1 - 200

=10001-200

= 9801