Question

evaluate( 999)²-(1)²​

Answer 1

Using identity asquare - b square = ( a+b)

(a-b)

(999+1)( 999-1)

1000 × 998

998000 answer

Answer 2

Answer:

( 999)² - (1)² = a²-a²= a²= (998)²= 998*998=996004