(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²怎么解
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/19 15:24:09
x){BPSBMZ5ШxPg
}OvvX&H,}v6r]$P)[
t0t+J!+F2.4Cn 34@o>7VYǴ
[#<;hـ9$_. 4Y$dz O=m]t{F` n0Px3U@J! :5
(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²怎么解
(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²怎么解
(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²怎么解
(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²
(x-1)(x²+x-1)-3-x(x+1)(x-1)+x²=0
(x-1)(x²+x-1-x²-x)+x²-3=0
(x-1)(-1)+x²-3=0
-x+1+x²-3=0
x²-x-2=0
(x+1)(x-2)=0
解得x=-1或x=2
(x-1)(x²+x-1)-3=x(x+1)(x-1)-x²
移项得:(x-1)(x²+x-1)-3-x(x+1)(x-1)+x²=0
提取公因式:(x-1)(x²+x-1-x(x+1))+x²-3=0
化简: - (x-1)+x²-3=0
x²-x-2=0
(x+1)(x-2)=0
解得x=-1或x=2