解方程(X 1)(X 2)(X 3)=60
下面有一个是你要的吧
(x-1)(x-2)(x-3)-60=0
x³-6x²+11x-66=0
x²(x-6)+11(x-6)=0
(x²+11)(x-6)²=0
x=6, ±i√11
(x-1)(x+2)(x+3)-60=0
x³+4x²+x-66=0
x²(x-3)+7x(x-3)+22(x-3)=0
(x²+7x+22)(x-3)=0
x=3, -7/2±i√39/2
(x+1)(x+2)(x+3)-60=0
x³+6x²+11x-54=0
x²(x-2)+8x(x...全部
下面有一个是你要的吧
(x-1)(x-2)(x-3)-60=0
x³-6x²+11x-66=0
x²(x-6)+11(x-6)=0
(x²+11)(x-6)²=0
x=6, ±i√11
(x-1)(x+2)(x+3)-60=0
x³+4x²+x-66=0
x²(x-3)+7x(x-3)+22(x-3)=0
(x²+7x+22)(x-3)=0
x=3, -7/2±i√39/2
(x+1)(x+2)(x+3)-60=0
x³+6x²+11x-54=0
x²(x-2)+8x(x-2)+27(x-2)=0
(x²+8x+27)(x-2)=0
x=2, -4±i√11
。
收起