7.若关于x的一元二次方程kx2-10x+3=0有一个根为3,则k的值为( )
| A. | 11 | B. | -11 | C. | 3 | D. | -3 |
6.若(m-2)x|m|+mx-1=0是关于x的一元二次方程,则( )
| A. | m=±2 | B. | m=2 | C. | m=-2 | D. | m≠±2 |
5.把下列方程化成一般形式后,常数项为0的方程是( )
| A. | 5x-3=2x2 | B. | x(x+1)=3(x+2)-6 | C. | (3x-1)(2x+4)=1 | D. | (x+3)(x+2)=-6 |
3.一元二次方程(3m+1)x2=2x的两根均为整数,则整数m的值为( )
0 286604 286612 286618 286622 286628 286630 286634 286640 286642 286648 286654 286658 286660 286664 286670 286672 286678 286682 286684 286688 286690 286694 286696 286698 286699 286700 286702 286703 286704 286706 286708 286712 286714 286718 286720 286724 286730 286732 286738 286742 286744 286748 286754 286760 286762 286768 286772 286774 286780 286784 286790 286798 366461
| A. | 0 | B. | -1 | C. | 0或-1 | D. | 0或1 |