几道数学题目。急啊。帮帮忙。。

1.4х^2-6х=0
2x(2x-3)=0
x1=0
x2=3/2

2.х^2+4х+8=4х+11

x^2=3
x1=根号3
x2=-根号3

3.（y-2)(y+1)+y(y-1)=0
y^2-y-2+y^2-y=0
2y^2-2y-2=0
y^2-y=1
(y-1/2)^2=1+1/4=5/4
y-1/2=(+/-)根号5/2
y1=1/2+根号5/2
y2=1/2-根号5/2

4.(3х-5)(х-2)=1

3x^2-6x-5x+10=1
3x^2-11x+9=0
x^2-11x/3+3=0
(x-11/6)^2=11^2/6^2-3=13/36
x-11/6=(+/-)根号13/6
x1=11/6+根号13/6
x2=11/6-根号13/6

1 x=0 x=1.5
2 x=根号3 x=-根号3
3 x=（根号5+1）/2 x=(1-根号5)/2
4 x=（根号13+11）/6 x=(11-根号13)/6

1.4х^2-6х=0
2x(2x-3)=0 x=0 x=3/2
2.х^2+4х+8=4х+11
х^2=4 x=2 x=-2
3.（y-2)(y+1)+y(y-1)=0
y^2-y-2+y^2-y=2y^2-2y-2=0 直接用一般公式做
4.(3х-5)(х-2)=1
3x^2-11x+9=0 直接用一般公式做

1
4х^2-6х=0
2x(2x-3)=0
x=0,x=3/2
2
х^2+4х+8=4х+11
x^2=3
x=正负根3
3
（y-2)(y+1)+y(y-1)=0
y^2-y-2+y^2-y=0
y^2-y-1=0
y=(1+根5)/2或(1-根5)/2