According to the following requirements, write out the algebraic formulas that meet the conditions, so that the result is 2x & sup2; - 3x + 4 (1) The sum of a binomial and a monomial (2) The difference between two trinomials

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• 1. Ask for an arithmetic problem in grade one of junior high school It takes 20 seconds for a train to travel at a constant speed through a 450 m long tunnel. There is a light on the tunnel, and the time it takes to shine on the train is 5 seconds. Question 1: the length of the train; question 2: the time it takes for the train to travel completely in the tunnel
• 2. 3 + 50 / 2 squared * (- 1 / 5) - 1 - 2 squared - 1 / 6 * [2 - (- 3) squared]
• 3. First year of junior high school, Do not fill in the blanks for one-time function application questions. Choose the + parallelogram Shuoli questions, 130 for each,
• 4. Arithmetic problems of linear equation of one variable Do not be too simple, do not apply the problem For example: x + 1 = 3 3 (1-x) + 2x = 5 Don't take it with you
• 5. English arithmetic problems A clock gains (fast) five seconds every hour.If We adjust it to the correct time, twenty four hours later, it's 5:58?
• 6. English translation 1+1=2 2-1 = 1 (two translations required) 1 * 1 = 1 1 / 1 = 1 (two translations required)
• 7. Help with an arithmetic problem I work in the problem, my company is to do gas station management, now the end of the calculation oil loss For example, the total loss and inventory gain (+ 400 liters), but 90% of gasoline loss (- 180 liters), 93% of gasoline loss (- 200 liters), 0% of diesel loss (+ 780 liters), I want to calculate the percentage of 90% of gasoline loss in the total loss?
• 8. I have a primary school arithmetic problem, There is a division formula. The sum of the divisor plus the divisor plus their quotient is 71. Given that the quotient is 7, how much is the divisor? How to write arithmetic
• 9. A simple arithmetic problem 999*1999*999
• 10. About the arithmetic of salary, how do you calculate it? A project salary (contract labor) total 21770 yuan There were six people doing it. They did 77.5 jobs The master who used to pay 150 yuan a day and the master who used to pay 110 yuan a day worked for 14.5 days Both 130 and 115 worked for 13.5 days The other 115 yuan man worked for nine days And 100 of them worked for 12.5 days How much are the salaries of these six people The daily rate of wage distribution remains the same What questions can I ask you I'm going to work out a Lai tonight~ The total salary of 21770 yuan is for these six people The distribution ratio is calculated according to the original daily wage of 150 110 130 115 100 It's just that now it's a contract... Their total salary is 21770, so their daily salary is much higher than their original daily salary
• 11. An arithmetic problem in grade one of junior high school 8°43′50〃+18°43′26〃×5-37°3′÷3=
• 12. Several multiplication problems in grade one of junior high school ①、-2X（-2）X π X（（-6）X7X（- π ） ② 3x (- 2) x 3x (- 4) x (- 7) x one sixth There's also a formula...
• 13. Give me some arithmetic problems in unit 1 ~ 3 of grade one! More is better 3Q
• 14. 3 △ 1 / 2-1 / 4 × 3 / 10 3 / 5 △ [(1 / 5 + 1 / 3) △ 2 / 9]
• 15. Given x + y = 36 and 4x + 2Y = 100, how much is x and y
• 16. 2.38*36.5+7.62*36.5 13 / 28 + 17 / 24 - (13 / 28 + 9 / 24) 5 / 7 * (2 / 3-3 / 7) / 1 / 3 7 / 9 [(1 / 4 + 5 / 6) * 4 / 13]
• 17. 1 / 2 ^ (n-1) = 1 detailed process of square root
• 18. 4 + 3I, On the second floor, I want to see how you solve XY. I have a problem there I can't check it out
• 19. One arithmetic problem -4.25 times 4 and 6 / 5 minus 4.25 times 6 and 6 / 1 plus 4 and 4 / 4 / 1. Simple algorithm
• 20. Giraffe is the tallest animal in the world. There is a giraffe 5m high, 23 higher than an elephant. Is this elephant tall?