1.求解方程:x ﹣ 6x ﹣ 4 = 0，x = 3 √ 13
2.求解方程:x+4x ﹣ 1 = 0，x = ﹣ 2 √ 5
3.求解方程:x ﹣ 6x+5 = 0，x1=5，x2=1
4.求解方程:x ﹣ 2x = 4，x = 1 √ 5
5.求解方程:2x ﹣ 3x ﹣ 3 = 0，x=/4
6.求解方程:x+2x ﹣ 5 = 0，x = ﹣ 1 √ 6
7.求解方程2x ﹣ 4x ﹣ 3 = 0，x = 1 √ 10/2
8.求解方程:x ﹣ 2x ﹣ 2 = 0，x = 1 √ 3
9.求解方程:x ﹣ 2x ﹣ 4 = 0，x = 1 √ 5
10.求解方程:2x-4x+1 = 0，x = 1 √ 2/2
11.x+x+1 = 0 x无解
12.x-18x+9 = 0x = 6 √ 2+9或x=-6√2+9
13.2x+5x-3 = 0x = 1/2或x =-3
14.x+6x+5 =-3 x =-2或x=-4
15.x-2x+8 = 9 x = √ 2+1或x=-√2+1
16.x+5x-20 = 4 x = 3或x=-8
17.x+13x+36 = 0 x =-4或x=-9
18.x-3x+4 = 2 x = 1或x=2
19.8x-40x+25 = 1 x=/2或x=/2
20.x-| x |-2 = 0，先去掉绝对值再分别求解一元二次方程
答案:当x大于0时，x=2或x=-1
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