1、用配方法解方程$x^{2} - 6x - 16 = 0$,此方程的解为____.
2、用配方法解方程$x^{2} - 4x - 3 = 0$,则原方程可变形为( )
A.($x - 2$)$\mspace{2mu}^{2} = 7$ B.($x - 2$)$\mspace{2mu}^{2} = 1$
C.($x + 2$)$\mspace{2mu}^{2} = 7$ D.($x + 2$)$\mspace{2mu}^{2} = - 1$
3、已知$x^{2} - 4x + y^{2} + 6y + 13 = 0$,则$x + y$的值为____.
4、解方程:
(1)$x^{2} - 4x - 5 = 0$
(2)$9t^{2} - (t - 1)^{2} = 0$
5、用配方法解方程$x^{2} - 4x - 3 = 0$,配方后的方程为( )
A.$(x - 2)^{2} = 7$ B.$(x + 2)^{2} = 7$ C.$(x - 2)^{2} = 1$ D.$(x - 2)^{2} = - 3$
6、用配方法解方程$x^{2} - 4x - 5 = 0$时,原方程应变形为( )
A.$(x - 2)^{2} = 9$ B.$(x - 2)^{2} = 1$ C.$(x - 4)^{2} = 21$ D.$(x + 2)^{2} = 9$
7、用配方法解方程$x^{2} + 2x - 99 = 0$,则原方程可变形为( )
A.$(x + 1)^{2} = 100$ B.$(x - 1)^{2} = 100$ C.$(x + 1)^{2} = 99$ D.$(x - 1)^{2} = 99$
8、用配方法解方程$x^{2} - 2x - 1 = 0$时,原方程应变形为( )
A.($x - 1$)$\mspace{2mu}^{2} = 0$ B.($x - 1$)$\mspace{2mu}^{2} = 2$
C.($x + 1$)$\mspace{2mu}^{2} = 0$ D.($x + 1$)$\mspace{2mu}^{2} = 2$
9、用配方法解方程$x^{2} - 4x - 3 = 0$时,原方程可变形为()
A.$(x - 2)^{2} = 7$ B.$(x - 2)^{2} = - 7$ C.$(x + 2)^{2} = 7$ D.$(x + 2)^{2} = - 7$
10、用配方法解方程$x^{2} - 4x + 1 = 0$,此方程的解为____.
11、解方程:
(1)$x^{2} - 4x - 3 = 0$
(2)$2x^{2} - 3x - 2 = 0$.
12、用配方法解方程$x^{2} - 4x + 1 = 0$,下列配方正确的是( )
A.($x - 4$)$\mspace{2mu}^{2} = 15$ B.($x - 2$)$\mspace{2mu}^{2} = 3$
C.($x - 2$)$\mspace{2mu}^{2} = 5$ D.($2x - 4$)$\mspace{2mu}^{2} = 15$
13、用配方法解方程$x^{2} - 2x - 99 = 0$时,此方程可变形为()
A.$(x - 1)^{2} = 100$ B.$(x - 1)^{2} = - 100$ C.$(x + 1)^{2} = 100$ D.$(x + 1)^{2} = - 100$
14、已知$
本站所有软件来自互联网,版权归原著所有。如有侵权,敬请来信告知 ,我们将及时删除。 琼ICP备2023003481号-5