Question

Evaluate using identity.

(3a-2b)^2


Please do it step by step ​

Answer 1

(3a-2b)^2=(3a)^2-2(3a)(2b)+(2b)^2

[by the identity (a-b)^2=a^2-2ab+b^2]

=9a^2-12ab+4b^2

It may be useful!