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一元二次方程x2+3x=0的解是( ) A.x=-3 B.x1=0,x2=3 C...
一元二次方程x2+3x=0的解是( )
A.x=-3
B.x1=0,x2=3
C.x1=0,x2=-3
D.x=3
考点分析:
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