问题
解答题
(1)计算:2
(2)解方程:x2+2x-8=0 |
答案
(1)原式=10
-93
+3,3
=
+3.3
(2)(x+4)(x-2)=0,
∴x+4=0,x-2=0,
解得x1=-4,x2=2.
(1)计算:2
(2)解方程:x2+2x-8=0 |
(1)原式=10
-93
+3,3
=
+3.3
(2)(x+4)(x-2)=0,
∴x+4=0,x-2=0,
解得x1=-4,x2=2.