问题
解答题
(1)计算:
(2)解方程:3x(x+1)=3x+3. |
答案
(1)原式=2
+2-2×3
+2-3 2 3
=2
+2-3
+2-3 3
=4;
(2)3x(x+1)=3x+3,
整理,得3x2-3=0,即x2=1,
解得x=±1.
(1)计算:
(2)解方程:3x(x+1)=3x+3. |
(1)原式=2
+2-2×3
+2-3 2 3
=2
+2-3
+2-3 3
=4;
(2)3x(x+1)=3x+3,
整理,得3x2-3=0,即x2=1,
解得x=±1.