Question

using identities ,evaluate 999²​

Answer 1

Step-by-step explanation:

We have (999)

2

=(1000−1)

2

=(1000)

2

−2×(1000)×1+1

2

[ Using (a−b)

2

=a

2

−2ab+b

2

]

=100000−2000+1

=998001

Answer 2

The above attachment will help u