计算:(1)2x2•(-4xy)2=______;(2)(a-3b)•______=a3-27b3;(3)(12a3b2c-8a4b2c2-10abc)÷23abc=______.-数学

题目简介

计算:(1)2x2•(-4xy)2=______;(2)(a-3b)•______=a3-27b3;(3)(12a3b2c-8a4b2c2-10abc)÷23abc=______.-数学

题目详情

计算:
(1)2x2•(-4xy)2=______;
(2)(a-3b)•______=a3-27b3
(3)(12a3b2c-8a4b2c2-10abc)÷
2
3
abc=______.
题型:填空题难度:中档来源:不详

答案

(1)2x2•(-4xy)2,
=2x2•16x2y2,
32x4y2;
(2)原式=(a3-27b3)÷(a-3b)=(a2+3ab+9b2);

(3)(12a3b2c-8a4b2c2-10abc)÷class="stub"2
3
abc,
=12a3b2c÷class="stub"2
3
abc-8a4b2c2÷class="stub"2
3
abc-10abc÷class="stub"2
3
abc,
=18a2b-12a3bc-15.

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