问题
解答题
解方程:(1)x2-2x-2=0;
(2)(x-2)2-3(x-2)=0.
答案
(1)x2-2x+1=3
(x-1)2=3
x-1=±
3 |
∴x1=1+
3 |
3 |
(2)(x-2)(x-2-3)=0
x-2=0或x-5=0
∴x1=2,x2=5.
解方程:(1)x2-2x-2=0;
(2)(x-2)2-3(x-2)=0.
(1)x2-2x+1=3
(x-1)2=3
x-1=±
3 |
∴x1=1+
3 |
3 |
(2)(x-2)(x-2-3)=0
x-2=0或x-5=0
∴x1=2,x2=5.