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下列对一元二次方程x2+x﹣3=0根的情况的判断,正确的是( )
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关于x的一元二次方程x+3·x-1=0的根是_______.
下列四个说法中正确的是
一元二次方程
有实数根;
一元二次方程
有实数根;
一元二次方程
有实数根;
一元二次方程x
2
+4x+5=a(a≥1)有实数根.
下列四个说法中正确的是
一元二次方程x
2
+4x+5=
有实数根
一元二次方程x
2
+4x+5=
有实数根
一元二次方程x
2
+4x+5=
有实数根
一元二次方程x
2
+4x+5=A.(A≥1)有实数根
已知关于x的一元二次方程x2+2x+m=0.1当m=3时判断方程的根的情况2当m=-3时求方程的根.
已知一元二次方程x2+x﹣1=0下列判断正确的是
该方程有两个相等的实数根
该方程有两个不相等的实数根
该方程无实数根
该方程根的情况不确定
.下列说法正确的是
形如ax
2
+bx+c=0的方程称为一元二次方程
方程(x+2)(x-2)=0是一元二次方程
方程x
2
-2x=1的常数项为0
一元二次方程中,二次项系数、一次项系数及常数项都不能为0
若正数a是一元二次方程x2﹣5x+m=0的一个根﹣a是一元二次方程x2+5x﹣m=0的一个根则a的值
下列叙述正确的是
形如ax
2
+bx+c=0的方程叫一元二次方程
方程4x
2
+3x=4不含有常数项
一元二次方程中,二次项系数一次项系数及常数项均不能为0
(3﹣y)
2
=0是关于y的一元二次方程
若正数a是一元二次方程x2-5x+m=0的一个根-a是一元二次方程x2+5x-m=0的一个根则a的值
已知关于x的一元二次方程2x2+x+m=0.1当m=1时判断方程的根的情况2当m=﹣1时求方程的根.
下列说法错误的是
方程ax
2
+bx+c=0是关于x的一元二次方程
方程3x
2
=-4的常数项是4
若一元二次方程的常数项为0,则0必是它的一个根
方程x
2
+1=-2无解
下列四个说法中正确的是A.一元二次方程有实数根B.一元二次方程有实数根C.一元二次方程有实数根D.一
下列关于一元二次方程的四种说法你认为正确的是
方程2y
2
-y+
=0必有实数根
方程x
2
+x+1=0的两个实数根之积为-1
以-1、2两数为根的一元二次方程可记为x
2
+x-2=0
一元二次方程2x
2
+4x+3m=0的两实数根的平方和为7,则m=-1
下列对一元二次方程x2+x﹣3=0根的情况的判断正确的是
有两个不相等实数根
有两个相等实数根
有且只有一个实数根
没有实数根
一元二次方程x2-3x=0的根是.
如果关于x的一元二次方程ax2+bx+c=0有两个实数根且其中一个根为另一个根的2倍则称这样的方程为
一元二次方程x2-2x-3=0的根的情况是
无实根
有两个相等实根
有两不等实根
无法判断
一元二次方程x2+x-2=0的根的情况是
已知关于x的一元二次方程x2+2x+m=0.1当m=3时判断方程的根的情况2当m=﹣3时求方程的根.
已知一元二次方程x2+x─1=0下列判断正确的是
该方程有两个相等的实数根
该方程有两个不相等的实数根
该方程无实数根
该方程根的情况不确定
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