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A.a2+a3=a5
B.2x2•(﹣xy)=﹣x3y
C.(a﹣b)(﹣a﹣b)=a2﹣b2
D.(﹣2x2y)3=﹣6x6y3
A.3a4﹣a4=3
B.(﹣5x3y2 )2=10x6y4
C.(x+1)(x﹣2)=x2﹣x﹣2
D.(ab﹣1)2=a2b2﹣1
A.3a4﹣a4=3
B.(﹣5x3y2 )2=10x6y4
C.(x+1)(x﹣2)=x2﹣x﹣2
D.(ab﹣1)2=a2b2﹣1
A.2a2•3a2=6a2
C.(﹣3a2b)2=6a4b2
B.(a﹣b)2=a2﹣b2
D.﹣a2+2a2=a2
A.6x6÷2x3=3x2
C.x2+x2=x4
B.﹣2x2y(x﹣y)=﹣2x3y+2x2y2
D.(﹣3xy2)3=﹣9x3y6
A.2a2+a3=3a5
C.(-2x)3=8x3
B.2ax•3a5=6a6
D.(﹣2x3)÷(﹣6x2)=x
A.x2+x2=x4
C.(-a2)3=-a6
B.(a-b)2=a2-b2
D.3a2•2a3=6a6
亦世凡华
2018-07-03
初中数学 | 选择题