2(x-1/2)-(x-1) 2(x+2)+3(1-1/3x) (a²+2a)-2(1/2a²+4a) 化简 2(x-1/2)-(x-1) 2(x+2)+3(1-1/3x) (a²+2a)-2(1/2a²+4a) 化简 今天必须 好的话有悬赏

问题描述:

2(x-1/2)-(x-1) 2(x+2)+3(1-1/3x) (a²+2a)-2(1/2a²+4a) 化简
2(x-1/2)-(x-1) 2(x+2)+3(1-1/3x) (a²+2a)-2(1/2a²+4a) 化简 今天必须 好的话有悬赏

2(x-1/2)-(x-1)
=2x-1-x+1
=x
2(x+2)+3(1-1/3x)
=2x+4+3-x
=x+7
(a²+2a)-2(1/2a²+4a)
=a²+2a-a²-2a
=0