Question

Using
Identities
solve:-

199X 210​

Answer 1

Answer:

41790

Step-by-step explanation:

(200-1)X(200+10)

(200)²+(-I+10)200 +(10)×(-1)

4OOOO+1800-10

41800-10

=41790.

Answer 2

Answer:

if my answer satisfies you then plz mark it as brilliant answer