(1)x²+x=0 x(x+1)=0 x=0或x=-1
(2)x²-2倍根号3x=0 x(x-2倍根号3)=0 x=0或2倍根号3
(3)x²+2x+1=4 (x+1)^2=4 则x+1=±2 x=1或-3
(4)36x²-1=0 x^2=1/36 X=±1/6
(1)x²+x=0 x(x+1)=0 x=0或x=-1
(2)x²-2倍根号3x=0 x(x-2倍根号3)=0 x=0或2倍根号3
(3)x²+2x+1=4 (x+1)^2=4 则x+1=±2 x=1或-3
(4)36x²-1=0 x^2=1/36 X=±1/6