分解因式:x3-4x= .
考点分析:
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如图,抛物线y
1=a(x+2)
2-3与y
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(x-3)
2+1交于点A(1,3),过点A作x轴的平行线,分别交两条抛物线于点B,C.则以下结论:
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其中正确结论是( )
A.①②
B.②③
C.③④
D.①④
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