计算:(1)x3?(2x3)2÷(x4)2;(2)?6a?(?12a2?13a+2);(3)(2x-1)(x-3)-2(x-1)2;(4)3(x

2024-11-23 00:39:21
推荐回答(1个)
回答(1):

(1)原式=x3?4x6÷x8
=4x9÷x8
=4x;
(2)原式=-6a?(-

1
2
a2)-6a(-
1
3
a)-6a?2
=3a3+2a2-12a;
(3)原式=2x2-6x-x+3-2x2+4x-2
=-3x+1;
(4)原式=3x2-3x-3x2+2x
=-x.