✔ 最佳答案
解方程式x^3-x^2+3x-2=0Solx^3-x^2+3x-2=0(x^3-0.71523x^2)+(-0.28477x^2+0.203676x)+(2.796324x-2)=0x^2(x-0.71523)-0.28477x(x-0.71523)+2.796324(x-0.71523)=0(x^2-0.28477x+2.796324)(x-0.71523)=0x=(0.28477+/-√(0.28477^2-4*2.796324))/2or x=0.71523x=(0.28477+/-√(-11.104203))/2 or x=0.71523x=(0.28477+/-3.322955i)/2 or x=0.71523x=0.142385+/-1.6614775 or x=0.71523