1.x²=8x-9=0
2.x²-10x+25=7
3.x²=6x=1
4.x²+12x+25=0
5.x²+4x=10
6.x²-6x=11
7.3x²+8x-3=0
8.x²+3x+1=0
9.2x²=6+7x
10.3x²-9x+2=0
11.x²-7x-18=0
12.2x²-9+8=0
13.16x²=8x=3
14.5x+2=3x²
15.(3x-5)(x-2)=1
16.x-2=x(x-2)
17.(x+2)(x-4)=(x-4)
18.4x(2x+1)=(2x+1)
19.3x(x-1)=2-2x
20.(2x+3)²=4（2x=3）
21.2(x-3)²=x²-9
22.5(x²-x)=3(x²+x)
23.(x-2)²=（2x+3)²
24.x²-5根号2+8=0
25.x（x-14）=0
26.x²+12x+27=0
27.x²=x+56
28.4x²-45=31x
29.-3x²+22x-24=0
30.(x+8)(x-1)=12
31.(x+1)²-3(x+1)+2=0
32.(4x+3)(5-x)=0
33.(x-1)²+3x(x-1)=0
34.2x²-4x-5=0
35.-3x²-4x+4=0
36.3x(x-1)=2-2x
37.(x-1)(x+2)=70
38.x(x+6)=7
39.(3-x)²+x²=9
40.一个面积为12平方米的矩形苗圃长比宽多两米,求苗圃的长与宽.
41.某种衣服平均每天可销售20件,没件盈利44元,若每件降价1元可多买五件,若每天盈利1600元,每件因降价多少. 1.x²=8x-9=0
2.x²-10x+25=7
3.x²=6x=1
4.x²+12x+25=0
5.x²+4x=10
6.x²-6x=11
7.3x²+8x-3=0
8.x²+3x+1=0
9.2x²=6+7x
10.3x²-9x+2=0
11.x²-7x-18=0
12.2x²-9+8=0
13.16x²=8x=3
14.5x+2=3x²
15.(3x-5)(x-2)=1
16.x-2=x(x-2)
17.(x+2)(x-4)=(x-4)
18.4x(2x+1)=(2x+1)
19.3x(x-1)=2-2x
20.(2x+3)²=4（2x=3）
21.2(x-3)²=x²-9
22.5(x²-x)=3(x²+x)
23.(x-2)²=（2x+3)²
24.x²-5根号2+8=0
25.x（x-14）=0
26.x²+12x+27=0
27.x²=x+56
28.4x²-45=31x
29.-3x²+22x-24=0
30.(x+8)(x-1)=12
31.(x+1)²-3(x+1)+2=0
32.(4x+3)(5-x)=0
33.(x-1)²+3x(x-1)=0
34.2x²-4x-5=0
35.-3x²-4x+4=0
36.3x(x-1)=2-2x
37.(x-1)(x+2)=70
38.x(x+6)=7
39.(3-x)²+x²=9
40.一个面积为12平方米的矩形苗圃长比宽多两米,求苗圃的长与宽.
41.某种衣服平均每天可销售20件,没件盈利44元,若每件降价1元可多买五件,若每天盈利1600元,每件因降价多少.