|x-1|=3，则x=什么？

若x - 1/x=3,则x2/x4+x2+1的值是???

x-1/x=3, (x-1/x)²=9 x²-2+1/x²=9 x²+1/x²=11 x2/(x4+x2+1)=1/(x²+1+1/x²)=1/12

若x - 1/x=3,则x^2+1/x^2= 详细点.

(x-1/x)^2=3^2X^2-2+1/X^2=9X^2+1/X^2=9+2=11

x - 1/x=3,x^3+1/x^3等于多少.

(x+1/x)^2=(x-1/x)^2+4(x+1/x)^2=3^2+4(x+1/x)^2=13 x+1/x=±√13 x^3+1/x^3=(x+1/x)(x^2-1+1/x^2)=(x+1/x)(x^2-2+1/x^2+1)=(x+1/x)[(x-1/x)^2+1]=±√13*[3^2+1]=±10√13

已知x - 1/x=3求x+1/x的值

x-1/x=3 平方得:x²+1/x²=9+2=11(x+1/x)²=x²+1/x²+2=11+2=13 x+1/x=±√13

(x - 3)(x - 1)=3

展开:x²-4x+3=3 x²-4x=0 x﹙x-4﹚=0 x₁=0 x₂=4

若x - 1/x=3,则x^2+1/x^2等于多少?

x^2+1/x^2 =x^2-2+(1/x)^2+2 =(x-1/x)^2+2 =3^2+2 =11

(x - 1)(x+3)等于多少

(x-1)(x+3)=x²+3x-x-3 =x²+2x-3

若1<x<3,则|x - 1| - |x - 3|=?

x-1+(x-3)=x-1+x+3=(x+x)+(-1-3)=2x-4

解方程 怎么解(x - 1)*3=x+8+1

你好!解:3x-3=x+8+1 2x=12 x=6如有疑问,请追问.

(x - 1)(x - 3)=2

(X-1)(X-3)=2X²-3X-X+3=2X²-4X+4=2+1(X-2)²=3X-2=±√3X=2±√3