X³-2X²+3=0 怎么解方程
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X³-2X²+3=0 怎么解方程
X³-2X²+3=0 怎么解方程
X³-2X²+3=0 怎么解方程
x³-2x²+3=0
(x³+x²)-(3x²-3)=0
x²(x+1)-3(x+1)(x-1)=0
(x+1)(x²-3x+3)=0
则:x+1=0或x²+3x+3=0【这个方程无解】
得:x=-1
x³+1-2x²+2=0
(x+1)(x²-x+1)-2(x+1)(x-1)
(x+1)(x²-x+1-2x+2)=0
(x+1)(x²-3x+3)=0
x²-3x+3=0无解
所以x=-1
X³-2X²+3=0
x³+1-2x²+2=0
(x+1)(x²-x+1)-2(x²-1)=0
(x+1)(x²-x+1)-2(x+1)(x-1)=0
(x+1)(x²-x+1-2x+2)=0
(x+1)(x²-3x+3)=0
x=-1