On the quadratic equation (a-6) with one variable of X, the square of x-8x + 9 = 0 has real roots. Find the maximum integer value of A

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1. The root of the quadratic equation of one variable x-4 = 0 is
2. If the equation | X-1 | - KX = 0 has and only has one positive real root, then the value range of real number k is______ ．
3. Given that the two real roots of equation x2 + KX + 6 = 0 are x1, X2, and the two real roots of equation x2-kx + 6 = 0 are X1 + 5, X2 + 5, then the value of K is equal to () A. 5B. -5C. 7D. -7
4. On the equation KX & # 178; + (2k-1) x + k-1 = 0 of X, there is only integer root. K is an integer. Find the value of K
5. If the perimeter of a parallelogram is equal to 50cm, then the length of each diagonal must be less than () cm
6. In a long-distance race, the athletes run 5 kilometers away from the starting point and return to the starting point. The leading athlete runs 320 meters per minute, and the last athlete runs 305 meters per minute. How many points do the two athletes meet after the start? How many meters are there from the return point when they meet?
7. The circumference of a rectangular piece of paper is 160cm, and the ratio of length to width is 5:3. If it is cut into the largest square piece of paper, what is the area of the square piece of paper?
8. 1、4+75/25-2+1/2= 2、（5/3-1）-（1/3-1/6）+5/10-1= 3、5-（13/6+11/8-17/12）-（2+1/6）= 4、5/12-【（8/5+11/30-8/15）-（17/10-7/20）】= 5、4/3-【3/4-（2/3-2/7）+3/14】+1+1/6-3/2= The first answer is: 11 / 2 The second answer is: 0 The third answer is: 17 / 24 The answer to the fourth question is: 1 / 3 The answer to the fifth question is: 5 / 12
9. There is a square lawn with a side length of 40 meters. The side length has been increased by 10 meters and expanded into a larger lawn. How many square meters has the lawn area increased
10. When a kettle with a mass of 0.3KG is filled with water, the total mass is 0.8kg, and when it is filled with another liquid, the total mass is 0.7kg, then the density of this liquid is () A. 1.4×103kg/m3B. 0.875×103 kg/m3C. 0.8 kg/m3D. 0.8×103 kg/m3
11. If the equation 5 + m / (X-2) + 1 = 1 / (2-x) about X has no solution, then M=
12. On a root of the equation x ^ 2-5x + M-1 = 0 of X It is known that a root of the equation x ^ 2-5x + M-1 = 0 about X and a root of the equation x ^ 2 + 5x-m + 1 = 0 about X are opposite numbers, and the value of M is obtained Let a root of equation x ^ 2-5x + M-1 = 0 be a, and a root of equation x ^ 2 + 5x-m + 1 = 0 be - A, then a^2-5a+m-1=0, a^2-5a-m+1=0 If you want to reduce 2m-2 to 0, then M = 1
13. Given that a is a root of the equation x2-5x + 1 = 0, then the number of bits of A4 + A-4 is______ ．
14. Given that a is a root of the equation x2-5x + 1 = 0, then the number of bits of A4 + A-4 is______ ．
15. It is known that one root of the equation 2x2 + 5x + P-3 = 0 about X is - 4. Find another root of the equation and the value of P
16. It is known that 2 is a root of the quadratic equation 5x & sup2; + bx-10 = 0 with respect to X. find another root of the equation and the value of B I have no answer. Please list the methods in detail. There are two methods
17. It is known that one root of the equation 2x & sup2; - 5x + P-3 = 0 about X is - 4. Find another root of the equation and the value of P Please answer quickly
18. In the equation mx-2 / 5 + 2 = x + 2m / 5, when what is the value of M, X is equal to - 1?
19. Why is the solution of the equation 3 / x + 6 / X-1 = x + m / X (x-1) equal to 1 / 2?
20. If the solution of equation 5x-2m = 3 (x-2m) + 1 is negative, what is m equal to? If the system of inequalities x-3 (X-2) is less than or equal to 4,3 / 3 A + 2x is greater than x, and there is no solution, the value range of a is obtained