问题
解答题
(1)计算:(
(2)解方程:x(x-2)+x-2=0. |
答案
(1)原式=
÷12
-3
÷48 3
=2-4
=-2;
(2)∵x(x-2)+x-2=0
∴(x+1)(x-2)=0
∴x+1=0或x-2=0
解得x1=-1,x2=2.
(1)计算:(
(2)解方程:x(x-2)+x-2=0. |
(1)原式=
÷12
-3
÷48 3
=2-4
=-2;
(2)∵x(x-2)+x-2=0
∴(x+1)(x-2)=0
∴x+1=0或x-2=0
解得x1=-1,x2=2.