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下列运算正确的是A.2a3+5a2=7a5B.3-=3C.(-x2)•(-x3)=-x5D...
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下列运算正确的是( )
A.2a
3+5a
2=7a
5B.3
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
=3
C.(-x
2)•(-x
3)=-x
5D.(
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACWSURBVDhP3ZPLEcAgCESpjJ5sh2YshVKIiIkG
fxcnhzjDeMgGNo8NyObAQQGTIKAQv3vaiBgEAFLNBKaS8HNBhqQcrEKssE7uYrLW/Yjb2OjWpvsO
hxLVgmopmYcUFCSxpGloPEnm8tDcxLBCrdnsR9Q3M4uZIMuKWWyy34FiQoHH9Iik8+E6sBD6r3j+
qj5Nny5rsfMLN2zqeSiCl84AAAAASUVORK5CYII=
)
m-n)(-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACWSURBVDhP3ZPLEcAgCESpjJ5sh2YshVKIiIkG
fxcnhzjDeMgGNo8NyObAQQGTIKAQv3vaiBgEAFLNBKaS8HNBhqQcrEKssE7uYrLW/Yjb2OjWpvsO
hxLVgmopmYcUFCSxpGloPEnm8tDcxLBCrdnsR9Q3M4uZIMuKWWyy34FiQoHH9Iik8+E6sBD6r3j+
qj5Nny5rsfMLN2zqeSiCl84AAAAASUVORK5CYII=
)
m-n)=n
2-
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACbSURBVDhP3VPJDcAgDPNk2Yl1skxHYRSXs4RS
ygf1UaQICTmJZRtwcbAR4JUCofp+Zl5xOAIINQNkFN3PAUmkqEMudzSxdnoxsXW9ohJ7uuPQ9YRN
ieqEciEZnVB9ULwKIcqaPKS4mYecrCY37h0MvSqglPSCZX8z6A4IfNIU46Z1dBBqJGmVGtZZqcvn
qeRq30Xy6Vd9ataL5yc50tZvk7le4QAAAABJRU5ErkJggg==
)
m
2
相关试题
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下列运算正确的是( )
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下列运算正确的是( )
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-
下列运算正确的是( )
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