(-x2)3=______;(-3xy2)2•(-2x2y)=______;[(x+y)2m+1]3•(x+y)5m+2=______.
题型:填空题难度:一般来源:不详
(-x2)3=______;(-3xy2)2•(-2x2y)=______;[(x+y)2m+1]3•(x+y)5m+2=______. |
答案
(-x2)3=-x2×3=-x6;
(-3xy2)2•(-2x2y), =9x2y4•(-2x2y), =-18x4y5;
[(x+y)2m+1]3•(x+y)5m+2, =(x+y)6m+3•(x+y)5m+2, =(x+y)11m+5. 故答案为:-x6;-18x4y5;(x+y)11m+5. |
举一反三
写一个以-的平方为系数,含x,y的四次单项式______. |
下列计算正确的是( )A.a+2a2=3a3 | B.a2•a3=a6 | C.(a3)2=a9 | D.(-3x2)•2x3=-6x5 |
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(-10)×(0.3×102)×(0.2×107)=______. |
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