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若关于x的一元二次方程x2-mx+n=0有两实根2和3,则m= .
若关于x的一元二次方程x2-mx+n=0有两实根2和3,则m= .
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A.1200米
B.
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C.
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D.
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米
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如图,数轴所示两点表示a,b两数,则下列比较
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的大小正确的是( )
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A.
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>
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B.
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<
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C.
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=
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D.无法比较
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已知方程x
2+kx-6=0的一个根是2,则它的另一个根为( )
A.1
B.-2
C.3
D.-3
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如图,△ADE∽△ABC,若AD=1,BD=2,则△ADE与△ABC的相似比是( )
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A.1:2
B.1:3
C.2:3
D.3:2
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