Question

09
find the value of (99)??​

Answer 1

Answer:

Correct option is

A

9999

Given, 99×101=(100−1)(100+1).

We know, (a+b)(a−b)=a

2

−b

2

.

Then,

99×101=(100−1)(100+1)

=(100)

2

−1

2

=10000−1

=9999.

Therefore, option A is correct.