问题
解答题
计算: (1)x3•(2x3)2÷(x4)2; (2)-6a•(-
(3)(2x-1)(x-3)-2(x-1)2; (4)3(x2-x)+(3x4-2x3)÷(-x2). |
答案
(1)原式=x3•4x6÷x8
=4x9÷x8
=4x;
(2)原式=-6a•(-
a2)-6a(-1 2
a)-6a•21 3
=3a3+2a2-12a;
(3)原式=2x2-6x-x+3-2x2+4x-2
=-3x+1;
(4)原式=3x2-3x-3x2+2x
=-x.