化简:(1)3(2a-4b)-2(3a+b);(2)4y2-[3y-(3-2y)+2y2]

化简:(1)3(2a-4b)-2(3a+b);(2)4y2-[3y-(3-2y)+2y2].
2025-05-21 12:53:48
推荐回答(1个)
回答(1):

(1)原式=6a-12b-6a-2b
=-14b;

(2)原式=4y2-3y+3-2y-2y2
=2y2-5y+3.