A.-x4y6 | B.xy6 | C.x4y8 | D.-x4y8 |
A.-4 | B.2 | C.4 | D.12 |
A.-22<(-0.5)2<-1.22 | B.-1.22<-22<(-0.5)2 |
C.-22<-1.22<(-0.5)2 | D.(-0.5)2<-1.22<-22 |
(x-y)2-3(y-x) |
2a+2b-(a+b)3 |
A.(m+1)2的值总是正的 | B.m2+1的值总是正的 |
C.-(m+1)2总是负数 | D.1-m2的值总比1小 |
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