问题
解答题
(1)|-3|+
(2)解方程:x2-2x-3=0. |
答案
(1)|-3|+
-12
-(2012-π)0-(3 8
)-11 3
=3+2
-2-1-33
=2
-3;3
(2)x2-2x-3=0,
(x-3)(x+1)=0,
x-3=0或x+1=0,
x1=3,x2=-1.
(1)|-3|+
(2)解方程:x2-2x-3=0. |
(1)|-3|+
-12
-(2012-π)0-(3 8
)-11 3
=3+2
-2-1-33
=2
-3;3
(2)x2-2x-3=0,
(x-3)(x+1)=0,
x-3=0或x+1=0,
x1=3,x2=-1.