Question

Expand the following (99)sq

Answer 1

9801= 9000+800+0+1
hey your answer is here

Answer 2

Helllo

99*2

(100-1)^2

100^2-2.100.1+(-1)*2

10000-200+1

9800+1

9801

thanks

Here (a-b)*2 is applied

Jay Hind