解方程2x^3+(1-根号5)x^2-2根号5x-根号5+5=02x^3+(1-根号5)x^2-2(根号5)x-根号5+5=0
问题描述:
解方程2x^3+(1-根号5)x^2-2根号5x-根号5+5=0
2x^3+(1-根号5)x^2-2(根号5)x-根号5+5=0
答
2x^3+(1-√5)x^2-2√5x-√5+5=0,
解得x1=(√5-1)/2,x2,3=土5^(1/4).