Question

Using suitable identities evaluate 1001×998

Answer 1

( 1000 +1) ( 1000 - 2)

Using identity :-

( x + a) (x + b) = x^2 + (a +b)x + ab

= ( 1000 +1)( 1000 - 2)

= ( 1000)^2 + ( 1 - 2)(1000) + (1)(-2)

= 1000000 - 1000 - 2

= 1000000 - 1002

= 998998

Answer 2

✔✔heya here ia ur answer☺✌

1001 × 998= (1000+1)(1000-2)

It is in the form of (x+a)(x+b) = x^2 + (a+b)x + ab

=> 1000^2 + ( 1-2) 1000 + (1×-2)

=> 1000000-1000-2

=> 998998

THANK YOU ☺

HOPE IT HELPS UH