问题
解答题
解方程:
(1)x(x-2)-x+2=0;
(2)2x2-3x-5=0.
答案
(1)原方程可化为:x(x-2)-(x-2)=0,
(x-2)(x-1)=0,
解得:x1=2,x2=1;
(2)原方程可化为:(2x-5)(x+1)=0,
2x-5=0或x+1=0,
解得:x1=
,x2=-1.5 2
解方程:
(1)x(x-2)-x+2=0;
(2)2x2-3x-5=0.
(1)原方程可化为:x(x-2)-(x-2)=0,
(x-2)(x-1)=0,
解得:x1=2,x2=1;
(2)原方程可化为:(2x-5)(x+1)=0,
2x-5=0或x+1=0,
解得:x1=
,x2=-1.5 2