(1)计算:﹣3×(﹣2)2+[(﹣3)×2]2;(2)计算:(3)5x4+3x2y﹣1﹣3x2y﹣6x4+2(4)3(x2y+xy2)﹣(3x2y﹣1)﹣3xy2-七年级数学

题目简介

(1)计算:﹣3×(﹣2)2+[(﹣3)×2]2;(2)计算:(3)5x4+3x2y﹣1﹣3x2y﹣6x4+2(4)3(x2y+xy2)﹣(3x2y﹣1)﹣3xy2-七年级数学

题目详情

(1)计算:﹣3×(﹣2)2+[(﹣3)×2]2;      
(2)计算:
(3)5x4+3x2y﹣1﹣3x2y﹣6x4+2        
(4)3( x2y+xy2 )﹣(3x2 y﹣1)﹣3xy2
题型:计算题难度:中档来源:安徽省期中题

答案

解:(1)﹣3×(﹣2)2+[(﹣3)×2]2;
=﹣3×4+36
=24;
(2)
=?(﹣)××
=
(3)5x4+3x2y﹣1﹣3x2y﹣6x4+2  
=(5﹣6)x4+(3﹣3)x2y+2﹣1
=1﹣x4;
(4)3( x2y+xy2 )﹣(3x2 y﹣1)﹣3xy2=3x2y+3xy2 ﹣3x2 y+1﹣3xy2=1.

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