请采纳谢谢
(x-2)^2=2(x-2)
x-2=2
x=4
2.(5y+4)(5y-4)=0
y=-4/5;y=4/5
3.(x-6)*(x-6)=0
x=6
x^2-8x+16=4x^2-20x+25
3x^2-12x+9=0
(3x-3)*(x-3)=0
x=1;x=3
1、解 (x-2)^2-2(x-2)=0
(x-2)(x-2-2)=0
x1=2 x2=4
2、解 (5y+4)(5y-4)=0
y1=-4/5 y2=4/5
3、解 (x-6)^2=0
x1=x2=6
4、解 (x-4+5-2x)(x-4-5+2x)=0
(-x+1)(3x-9)=0
x1=1 x2=3