Knowing x 2 0, find the value of the algebraic formula x 1 x 1 x x 1

x^2-2=0,x^2=2

Original = (x 2+1-2x) x 2-1+x 2 x+1 substitute x 2=2 to get.

1-2x)/2+1/x+1

Divide the formula and get.

1-2x)(x+1)+2) 2(x+1) After simplifying, substitute x 2=2 into it, simplify, and obtain.

x+1)/2(x+1)

If c is not equal to d

So is it not the number of fierce imagination.

x(x Zhiyin+2x)-7

x （x²+x+x）-7

x (potato 1 + x) - 7

Recently, e=f

x²+x-1=0

i.e. Songdan: x +x=1

So. x³+2x²-7

x³+x²+x²-7

x(x²+x)+x²-7

x+x Wild Skin Disturbance Grip -7

Original = (x+1) x+1)(x-1)-x (x-1)(x+1) (x-1)-x (x-1).

1/(x-1)

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Answer]: B Pulse Analysis: x Zhenxiao + x-1 = 0

x²+x=1

x Royal Silver contains +x +x-5=x(x +x)+x -5=x+x -5=1-5=-4

x^3+2x^2-7=x^3+x^2-x+x^+x-1+1-7=x*(x^2+x-1)+x^2+x-1 -6=x*0+0-6=-6

So if x 2+x-1=0, then the value of the algebraic formula x 3+2x 2-7 is (-6).

There are too many topics. I'll help you get one. x3-2x2-1=(x3-x2)-x2-1=x(x2-x)-x2-1=(x-x2)-1=-1-1=-2

1，x³-2x²-1＝x³-x²-x-(x²-x-1)-2=(x-1)(x²-x-1)-2=-2

3, (2-x) = 4(x+3) x = -8 or x = -4 3

4. Because a, b, and c are the three sides of the triangle respectively, then a+b>c,a+c>b,b+c>a, so m-c = a -2ab+b -c (a-b+c)(a-b-c)<0

5, (6a b-3a b -9a b) = 3a b (2a-b-3), so (6a b-3a b -9a b) (2a-b-3) = 3a b

6,（a³+6a²+9a)/(a²+3a)=a+3

7, because ((x+1) -x-1)) = (x+1)[(x+1) -1]=x(x+1)(x+2).