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下列方程中是一元二次方程的是A.x2=0B.x2-5x=(x-2)2C.-1=0D.(a-...
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下列方程中是一元二次方程的是( )
A.x
2=0
B.x
2-5x=(x-2)
2C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAqCAYAAADS4VmSAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAFySURBVFhH7VdtssMgCORk3snrcBmP4lF4oMG0
TfyoKc/8SGYyTTsRl11cKNDiCxbvTzcFEJEcOMJoz8+RgeAJAPheBSAlHcg/AB4GHgaWMZBMSHwg
3z7YmtFNrdg26bfoDwNcZ3vBjTwf1OHmdaVQr0twWwDa1h1SHiukwzLb5XvmcoqB4Fuyed5Kr0jo
ZK6QzV9/34WcAvBWBx0JIjo2tPPNOwwIes20HoB6NSDO+kH7awJVBiL6MhMmymtBOgACM9CaL8ck
SP2hwkIDgNAvR1QSSEf15N0xAKmCGzJ8mIMWqdOxWk/EiWGMAWAGvNGMPgQgoJ7l33epLgDV8fdb
DxiRbF505DpAAxmqDBzdzuafUlcCK+o1LmSrhEJ103QM0GQGNrsU17rS22fwbRJk398LbibU3JpS
A8Uu5+JMr9oA8BHjvg3/zb8OJMGzz2vb5E/cJ4rpzEYXpqE0J771/0bvHg36zXvrfeAbtBbvLmfg
D9QM/xH9ZNYaAAAAAElFTkSuQmCC
)
-1=0
D.(a-1)x
2+bx+c=0
相关试题
-
下列方程中是一元二次方程的是( )
A.x2=0
B.x2-5x=(x-2)2
C.
-1=0
D.(a-1)x2+bx+c=0
-
下列方程中是一元二次方程的是( )
A.x2=0
B.x2-5x=(x-2)2
C.
-1=0
D.(a-1)x2+bx+c=0
-
下列方程中是一元二次方程的是( )
A.ax2+bx+c=0
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAjCAYAAAAHUl3/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAI+SURBVGhD7ZjtkYQgDIapzJ6o5P7bDKVYSo4I
IoooHy+yM7IzNzvrYQIPSXiDoPGBEBAQK8MIDZCgIOgLcplpEhPNC2g1Hc30A6kkCSH035dAukXr
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qVMRFo08mY+mtpJSLx35+SBITmmo8rEKwGhJgbN9sIveeA6ihebJzNk/K9JSWx8wh7qof19CjT1H
BvGtrWOExxTGtnkp32d3Su7yb7VvQTyCXAfbqNm/IzvdG2SgKBgsMNqDmr5vnKCta3GHiHFeJHE6
gwwj0KQhTGUEG2Xsc1DaiOQH3PMyxLy6wqEeT5E8W3dZe+vn1HntZQcL8m6jXGqbFK5c+EVEptSh
pzE5JfaqFJ3r+ZM///++7ySQxKddrUbsnNpn4Nh2lmXvuasLUluP4Y6l9ibml0BaGYSXbH7W+ocN
KyOrEbkOrY5LgZS+l5O7KWPtAQo7ZDyfUfnD9cA53E5w6DbalNgkVG35uAPpxHjLy+IaQZ4SBbEx
/n3mqsPQl8M1k8O9+yjIa121vc+snR3u/eYgg6ly+dhKB7IZwDEpsvQ6SHeguemWNwNFK2700rsg
D/VyXxGkGWgEKNXsiyA58iKdE6IZSF1xo3GvgVQyLkkgzUAjQKlmXwEZXAp7wh3WDKSuuNG45iCv
b20k/dlbo+bNQCNwZ7PNQb60ju5uBkjQFgyQAySIAMjMP5uzkDfMOl1OAAAAAElFTkSuQmCC
)
C.x2=0
D.5x2-6y-2=0
-
下列方程中,两根是-2和-3的方程是( )
A.x2-5x+6=0
B.x2-5x-6=0
C.x2+5x-6=0
D.x2+5x+6=0
-
下列一元二次方程中,两实根和为5的是( )
A.x2-5x+8=0
B.x2+5x-8=0
C.x2+5x+8=0
D.x2-5x-8=0
-
下列一元二次方程中,两实根和为5的是( )
A.x2-5x+8=0
B.x2+5x-8=0
C.x2+5x+8=0
D.x2-5x-8=0
-
下列方程中是一元二次方程的是( )
A.5x2-6y-2=0
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAjCAYAAAAHUl3/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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D/VyXxGkGWgEKNXsiyA58iKdE6IZSF1xo3GvgVQyLkkgzUAjQKlmXwEZXAp7wh3WDKSuuNG45iCv
b20k/dlbo+bNQCNwZ7PNQb60ju5uBkjQFgyQAySIAMjMP5uzkDfMOl1OAAAAAElFTkSuQmCC
)
C.x2=0
D.3x+1=5x+7
-
下列方程中是一元二次方程的是( )
A.5x2-6y-2=0
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFIAAAAjCAYAAAAHUl3/AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.x2=0
D.3x+1=5x+7
-
下列一元二次方程中,有两个不相等的实数根的方程是( )
A.x2+5x+4=0
B.x2-2x+1=0
C.x2+4x+5=0
D.x2+1=0
-
下列方程中,没有实数根的方程是( )
A.x2-2x+4=0
B.3x2-12x-6=0
C.2x2+5x=0
D.x2-4=3