Question

(999)² by using property ​

Answer 1

Answer:

(100 - 1 )²

(100)² + (1)²-2(100)(1)

further solve it

Answer 2

Answer:

Lets break 999 into 1000-1

A.T.Q.,

(999)²

(1000-1)²

1000² + 1² - 2(1000)(1)

1000000 + 1 - 2000

998001