A.x6 | B.x2 | C.x5 | D.x |
A.x2+x2=x4 | B.x2-x2=x0 | C.x2×x2=x4 | D.x2÷x2=x1 |
A.(a2)3=a5 | B.(-3a3)2=6a6 | ||
C.(-a)3÷a2=a | D.22008×(
|
A.3a+2b=5ab | B.4m2n-5mn2=-m2n |
C.3x3×(-2x2)=-6x5 | D.(-a)3÷(-a)=-a2 |
A.1.00×102有2个有效数字 |
B.(a-b)2=a2-b2 |
C.a2+a3=a5 |
D.a10÷a4=a6 |
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