问题
解答题
(1)解方程:x2-4x-12=0; (2)计算:
|
答案
(1)x2-4x-12=0,
(x+2)(x-6)=0,
x+2=0,x-6=0,
x1=-2,x2=6;
(2)
+(π-3.14)0-18 2
=3
+1-2 2
=2
+1.2
(1)解方程:x2-4x-12=0; (2)计算:
|
(1)x2-4x-12=0,
(x+2)(x-6)=0,
x+2=0,x-6=0,
x1=-2,x2=6;
(2)
+(π-3.14)0-18 2
=3
+1-2 2
=2
+1.2