What is the solution of X & # 178; - 3x + 18 = 0,

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• 1. It is known that the set a = {x | X & # 178; + 3x-18 > 0}, B = {x | X & # 178; - (2k + 1) x + K (K + 1) ≤ 0, And a ∩ B ≠ &;, then the value range of real number k is——
• 2. (3x²-2x-1)÷（x-1)=（
• 3. (- 4x) (2x & # 178; + 3x-1) to specific process
• 4. Find the maximum value of the following format: (1) y = 2x & # 178; + 8x + 9 (2) y = - 2x & # 178; + 3x + 7
• 5. 1.x²+4/3x+______ =(x+____ )² 2. Given (A & # 178; + B & # 178;), # 178; - (A & # 178; + B & # 178;) - 6 = 0, then a & # 178; + B & # 178=____ 3. The equations are solved by formula method and collocation method: 2x & # 178; - 3x = 2, 2x-y & # 178; + 6y-11 = 0, x-2y-1 = 0
• 6. (3x-1)²=4(x+1)²
• 7. It is known that (M & # 178; - 1) x & # 178; - MX + 8 = 0 is a one variable linear equation about X. find the value of formula 199 (M + x) (x-2m) + 22m
• 8. If you answer well, add it again! Use the equation! (it's better to use the equation of one variable once) According to statistics, from October 11, 2008 to February 28, 2009, the total daily average passenger volume of ground bus and rail transit was 16.96 million person times, and the daily average passenger volume of ground bus was 4 times less than that of rail transit by 690000 person times, The average daily passenger volume of ground bus and rail transit, how many million people do you have? The basic price of household electricity in a city is 0.4 yuan per kilowatt hour. If the monthly electricity consumption exceeds a kilowatt hour, 70% of the basic electricity price will be charged (1) A household uses 84 degrees of electricity in May and pays 30.72 yuan in total. How much is a? (2) If the average electricity charge in June is 0.36 yuan per kilowatt hour, how many kilowatt hours does the household share in June and how much electricity charge should be paid?
• 9. Solving two mathematical problems (solving linear equation with one variable) First: Party A and Party B want to jointly contract a project. Party A will complete the project within 30 days and Party B will complete the project within 20 days. The contract stipulates that the project will be completed within 15 days. Otherwise, a fine of 1000 yuan will be imposed for each day. Party A and Party B sign the contract after discussion (1) Under normal circumstances, can party A and Party B renew the contract? Why? (2) at present, 75% of the project is jointly carried out by Party A and Party B. because there is something urgent elsewhere, one person must be transferred. Who is more suitable to be transferred? Why? The second way: there is a home appliance store that increases the selling price of a refrigerator by 40% according to yuan, and then writes "big reward, 20% discount" in the front advertisement. After consumers complain, the price department will impose a fine of 2700 yuan per refrigerator according to 10 times of the illegal income, and ask for the selling price of yuan per refrigerator The second question is like this: a household appliance store will increase the original price of a refrigerator by 40%, and then write "big reward, 20% discount" in the front advertisement. After consumer complaints, the price department will impose a fine of 2700 yuan per refrigerator according to 10 times of the illegal income, and ask for the price of each ice box
• 10. At 8:00 a.m., someone took a boat with bamboo and went upstream. At 10:30 a.m., he found a bundle of bamboo falling into the river. He immediately turned around and went downstream to chase it. It took him 30 minutes to catch up with the bamboo pole. When did the bamboo pole fall into the water? 2. A group of infantry is advancing at a constant speed of 5.4 km / h. the correspondent runs from the end of the team to the head of the team and immediately returns to the end of the team. If the correspondent's speed is 21.6 km / h, what is the length of the infantry line?
• 11. Calculation: 39 × 37-13 × 34=______ ．
• 12. Factorization of mathematical problems （a+1）×（a+2)×（a+3)×（a+4）+1
• 13. Seeking three eight mathematical problems urgently
• 14. Factorization problem 3x ^ 4 + 6x ^ 2-9
• 15. Quick answer in 5 minutes` x@-3x-4 = (x-4)(x+1) The above factor is determined by x@-3x-4 How to evolve into (x-4) (x + 1) and what formula to use in it`` …… [@ for square]
• 16. ① 16m ^ - n ^ 4 ② 16 (a-b) & # - 178; - 9 (a + b) & # - 178; ③ x ^ 5y-xy ④ 2012 & # - 178; - 2011 & # - 178; ⑤ 429 & # - 178; × 2-171 & # - 178; × 2 ⑥ 1000 & # / 252 & # - 178; - 248 & # - 178; ⑦ (50 and 1 / 11) & # - 178; - (49 and 10 / 11) & # - 178;
• 17. Who can work out some factorization problems in grade one of junior high school
• 18. Several factorization problems in grade one of junior high school 1.（x-y)²+4xy 2.(x-1)(x-2)-2(2-x)² 3.(a²+ab+b²)²-9a²b²
• 19. 1. Factorization: (2 times of X + 2x) (2 times of X + 2x-2) - 3 2. If a and B are integers, and the degree 2-x-1 of X is a factor of the degree 3 of AX + the degree 2 + 1 of BX, find the value of B 3. Find the minimum value of the second power of 4x - x + 3 Quick return,
• 20. There are questions about factorization in grade one of junior high school （1）a²+（2b-3）a+b²-3b+2 (2) 9 to the power of N - 3 to the power of (n + 2) - 10 Like [the fourth power of X - 3 times the square of X + 1] （1）a²+（2b-3）× a+b²-3b+2