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

Question

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

Answer 1

9a2-2*3a*(-2b)+4b2-3a2-2ab-3ab+2b2
6a2+7ab+6b2
..........................

Answer 2

9a^2-12ab+4b^2-3a^2+2ab+3ab-2b^2=6a^2-7ab+2b^2