2xy-x2-y2+9 Decomposition cause death form

(3-x+y)(3+x+y)

RELATED INFORMATIONS

1. What is the sum of [1 / 2XY + Y2 + 1] + [x2-1 / 2xy-2y2-1]
2. Given x2 + y2 = 2, find the value range of x2-2xy-y2
3. If y = √ 1-2x + √ 2x_ 1 + 1 / 2, find √ x2 + Y2 - √ x2 + Y2 + 2XY =?
4. What is the cubic power of AX2 + 2a2x + A and - 2xy-x2-y2,
5. -2xy-x2-y2 factorization
6. Can x2-2xy + y2 = 1 be factorized
7. Decomposition factor: 1-x2 + 2xy-y2=______ ．
8. Factorization factor 1-x2 + 2xy-y2
9. Given x + y = 1, find the value of x2 + 2XY + Y2
10. If x2-2xy-y2-x + Y-1 = 0, find the value of X-Y
11. (x2-2xy + Y2) - (x2 + 2XY + Y2) = what
12. If there is a point on the right branch of hyperbola x2a2 − y2b2 = 1 (a > 0, b > 0), and the distance from it to the right focus and the left quasilinear is equal, then the value range of eccentricity of hyperbola is () A. (1，2]B. [2，+∞)C. (1，2+1]D. [2+1，+∞)
13. If there is a point on the right branch of hyperbola x2a2 − y2b2 = 1 (a > 0, b > 0), and the distance from it to the right focus and the left quasilinear is equal, then the value range of eccentricity of hyperbola is () A. (1，2]B. [2，+∞)C. (1，2+1]D. [2+1，+∞)
14. The sum of three consecutive even numbers is 3a, and the smallest of the three numbers is 3a______ The biggest is______ ．
15. It is known that: as shown in the figure, ∠ B = ∠ C = 90 °, M is the midpoint of BC, DM bisects ∠ ADC. (1) prove that am bisects ∠ bad; (2) try to explain the position relationship between DM and am? (3) What is the relationship between CD, AB and ad? Write the results directly
16. There are five glass balls in each of three colors in the bag. If you feel at least a few glass balls, you can guarantee that there are two kinds of glass balls in the same color?
17. A four digit integer is first rounded to ten, then rounded to hundreds, and then rounded to thousands. At this time, the number is the third power of 3 * 10. What is the maximum and minimum value of this number! Please tell me how to calculate it
18. In the number of columns 1, - 3,5, - 7,9, - 11 ~ at least take out a few numbers to make the sum equal to 0 I'm in urgent need. I hope those who can answer
19. Seven questions on Mathematics in the world
20. Mathematical sequence, finding the law 1,3,2,6,5,15,14,x,y,z,122…… The values of X, y and Z are? What are the rules in this series?