2(3a²-b²)-(3a-2b)(2a+b)

Question

2(3a²-b²)-(3a-2b)(2a+b)

Answer 1

= 6а²-2в²-6а²+4ав-3ав+2в²=ав
выделенное сократили

Comments

спасибо

Answer 2

1.6а^2-2b^2-(6a^2+3ab-4ab-2b^2)
=6a^2-2b^2-6a^2+ab+2b^2=ab.