[-x2(n-2)]3的计算结果是( )A.x6n-12B.-x6n-12C.x2n-1D.-x2n-1
题型:单选题难度:简单来源:不详
[-x2(n-2)]3的计算结果是( )A.x6n-12 | B.-x6n-12 | C.x2n-1 | D.-x2n-1 |
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答案
[-x2(n-2)]3=[-x2n-4]3=-x6n-12. 故选B. |
举一反三
已知a2+2a+b2-4b+5=0,则a=______,b=______. |
下列计算中,不正确的是( )A.-3a+2a=-a | B.(-2x2y)3=-6x6y3 | C.3ab2•(-2a)=-6a2b2 | D.(-5xy)2÷5x2y=5y |
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计算:(a-2b)5•(2b-a)3=______. |
若(2x-y)2与|x+2y-5|互为相反数,则(x-y)2013=______. |
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