计算或化简:(1)(?2009)0+(12)?1+(?2)3; (2)(2x-3y)2-(y+3...

2025-04-26 02:27:00
推荐回答(1个)
回答1:

(1)原式=1+2-8
=-5;

(2)原式=4x2-12xy+9y2-9x2+y2
=-5x2-12xy+10y2