Question

find this identities (210)²​

Answer 1

Answer:

210 can be written as 200+10

(200+10)^2=(200)^2+(10)^2+2×200×10

=40000+100+4000

=44100.

Answer 2

(200+10) square

A SQUARE + 2 A B + B SQUARE                            [FORMULATION]

200 square + 2* 200 * 10 + 10 square

40000 + 4000 + 100

44100