计算:(1)x3•(2x3)2÷(x4)2;(2)-6a•(-12a2-13a+2);(3)(2x-1)(x-3)-2(x-1)2;(4)3(x2-x)+(3x4-2x3)÷(-x2).-数学

题目简介

计算:(1)x3•(2x3)2÷(x4)2;(2)-6a•(-12a2-13a+2);(3)(2x-1)(x-3)-2(x-1)2;(4)3(x2-x)+(3x4-2x3)÷(-x2).-数学

题目详情

计算:
(1)x3•(2x32÷(x42
(2)-6a•(-
1
2
a2-
1
3
a+2)

(3)(2x-1)(x-3)-2(x-1)2
(4)3(x2-x)+(3x4-2x3)÷(-x2).
题型:解答题难度:中档来源:不详

答案

(1)原式=x3•4x6÷x8
=4x9÷x8
=4x;
(2)原式=-6a•(-class="stub"1
2
a2)-6a(-class="stub"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.

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