问题
解答题
计算 (1)计算:(
(2)解方程:3x(x-1)=2(x-1) |
答案
(1)原式=(2
+6
)-(2 2
-2 4
)6
=2
+6
-2 2
+2 4 6
=3
+6
;2 4
(2)方程变形得:3x(x-1)-2(x-1)=0,即(x-1)(3x-2)=0,
可得x-1=0或3x-2=0,
解得:x1=1,x2=
.2 3
计算 (1)计算:(
(2)解方程:3x(x-1)=2(x-1) |
(1)原式=(2
+6
)-(2 2
-2 4
)6
=2
+6
-2 2
+2 4 6
=3
+6
;2 4
(2)方程变形得:3x(x-1)-2(x-1)=0,即(x-1)(3x-2)=0,
可得x-1=0或3x-2=0,
解得:x1=1,x2=
.2 3