问题
填空题
直接写出方程的解x2-3x=0______,x2-3x+2=0______,(x-1)2=4______.
答案
(1)原方程可化为:x(x-3)=0,
x=0或x-3=0,
解得:x1=0,x2=3;
(2)原方程可化为:(x-1)(x-2)=0,
x-1=0或x-2=0,
解得:x1=1,x2=2;
(3)(x-1)2=4,
x-1=±2,
解得:x1=3,x2=-1.
直接写出方程的解x2-3x=0______,x2-3x+2=0______,(x-1)2=4______.
(1)原方程可化为:x(x-3)=0,
x=0或x-3=0,
解得:x1=0,x2=3;
(2)原方程可化为:(x-1)(x-2)=0,
x-1=0或x-2=0,
解得:x1=1,x2=2;
(3)(x-1)2=4,
x-1=±2,
解得:x1=3,x2=-1.