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若关于x的方程x2+(k-2)x+k2=0的两根互为倒数,则k= .
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3个
若关于x的方程x2+k﹣2x+k2=0的两根互为倒数则k=.
下面是小刚同学在一次测试中解答的部分填空题其中解答正确的是
若x
2
=4,则x=2
方程x(2x-1)=2x-1的解为x=1
若分式
的值为零,则x=1或2
若关于x的方程x
2
+2x+k=0两根的倒数和等于4,则 k=-
若关于x的方程x2+|k|﹣2x+k=0的两根互为相反数则k=.
关于x的方程k2x2+2k-1x+1=0有实数根则下列结论正确的是
当k=
时方程两根互为相反数
当k=0时方程的根是x=-1
当k=±1时方程两根互为倒数
当k≤
时方程有实数根
关于x的一元二次方程x2﹣k+2x+k2﹣1=0的两根互为倒数则k的值是________.
下列说法不正确的是
方程x
2
=x有一根为0
方程x
2
-1=0的两根互为相反数
方程(x-1)
2
-1=0的两根互为相反数
方程x
2
-x+2=0无实数根
已知关于x的一元二次方程x2﹣k+2x+2k=0k为常数. 1求证无论k取何实数该方程总有实数根
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