Using formula method to solve equation; 2x (X-2) = (x + 1) (x-1)

2X（X-2）=（X+1）（X-1）
2X^2-4X=X^2-1
X^2-4X+1=0
X=[4±√(4^2-4)]/2=(4±√12)/2=2±√3
x1=2+√3 x2=2-√3

RELATED INFORMATIONS

1. (1+1/15)+(3+1/35)+(5+1/63)+(7+1/99)+(9+1/143)+(11+1/195)
2. The monotone increasing interval of function f (x) = 2x ^ 3-3x ^ 2-36x + 16 is?
3. What fraction of 8 = 5 / 10 = () divided by 4 = 360 divided by () = what fraction of 1?
4. Simplification: 2 | x | - 3x / | - 2x - | - 5x | - x + 5 | + | - 2x-3 | - 3 + | - 2 - | - 1 + X|||
5. Simple operation of 1 / 2 × 11 / 20 + 1 / 2 △ 20 / 49
6. Solving an absolute value inequality Inequality: x|x-a| - 2
7. How many meters is three Zhang
8. Calculate | quarter to half | + | sixth to quarter | + | eighth to sixth | + · + | 208 to 206
9. Wang Zhuang's weight is 39 kg. How many kg does his blood contain?
10. 40% of a number is 0.5 more than 1 / 3 of it. How to find this number
11. Calculation: 30.26 degree=____ °____ ′____ 〃 18°15′36〃 =____ __ ° How to figure out... Please give me a clear idea
12. The general solution of the differential equation y '- 3 / xy = x to the power of 3 and e to the power of X To be specific,
13. The quotient is 14 and the remainder is 6. The sum of the divisor and the divisor is 126. What are the divisor and the divisor
14. Cut a cylinder, a cone, a frustum, and a frustum with a plane passing through the axis of the following body of revolution
15. What is the figure of plane oblique section cone? It's an ellipse if you cut a cylinder obliquely. I know, Ask 2, 3 floor plane oblique section conic get figure is ellipse? Yes or no?
16. What are the figures obtained by cutting a cylinder, a cone or a frustum through the plane of the axis of the following body of revolution? It's urgent. Thank you
17. What figure can be obtained by cutting a cone with a plane parallel to the contour line of the cone? Is it a parabola?
18. A plane parallel to the bottom of a cone cuts the cone, the diameter of the cross section and the bottom is 3cm and 9cm respectively, and the distance between the cross section and the bottom is 4cm Find the area of this cone's axis section
19. If a plane parallel to the ground of the cone divides the cone into two equal segments, then the ratio of the side area of the two parts is I did a good job Can you do me a favor
20. If the cone is cut into two parts with equal side area by a plane parallel to the bottom, and the volume of the small cone is 1, then the volume of the original cone is ()