令a=3x^2-2x-1b=x^2-x+2则有:a+b=4x^2-3x+1方程化为:4ab=(a+b)^2即(a-b)^2=0故a=b代入得:2x^2-x-3=0(2x-3)(x+1)=0因此解为:x=1.5, -1