解由3x^2-2=6x得3x^2-6x=2即x^2-2x=2/3即x^2-2x+1=2/3+1即(x-1)^2=5/3则解得x-1=√15/3或x-1=-√15/3即解得x=1+√15/3或x=1-√15/3.
3x的平方-2=6x3x²-6x=23(x²-2x)=23(x²-2x+1-1)=23(x-1)²-3=23(x-1)²=5(x-1)²=5/3x-1=±√(5/3)x=1 ± √15/3