X square - 1 / 2x square + 2x + 1-X-1 / 1,

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• 1. 4X + 15 less than or equal to x square + 2x
• 2. What is the square of 2x - 10 Factoring is fast
• 3. When x = 5, the square of x = 25,2x = 10; when x = what, the square of x = 2x
• 4. 1.8-2x / X squared - 16, where x = - 2 2. X-2 / 1 + 3 = X-2 / X-1 3 + 2 / x-x = 1 / 2 + X + 1 / 3
• 5. (2-x) square = 16 4 (x + 1) square - 25 = 0 x square - 2x + 1 = 3
• 6. The teacher wrote 13 natural numbers on the blackboard and asked Xiao Wang to calculate the average (with two decimal places). The answer Xiao Wang calculated was 12.43. The teacher said that the last number was wrong and the other numbers were all right. What's the correct answer? The teacher said that the last number was wrong and all the other numbers were right The average value must be greater than 12.4 and less than 12.5 12.4*13=161.2 12.5*13=162.5 Therefore, the sum of 13 natural numbers is greater than 161.2 and less than 162.5, and they are also natural numbers So the sum of these 13 numbers can only be 162 So the average is 162 / 13 = 12.46 You have a good way to solve it
• 7. The sum of a / B is 162.8. If the decimal point of a is moved one place to the left, it is equal to B. what are the numbers a and B?
• 8. If the sum of a, B and C is 13.23, then a=
• 9. If the sum of a and B is 18.7, the decimal point of a moves one place to the right, which is exactly equal to the number of B, how much is each of a and B Formula
• 10. If the sum of a and B is equal to 18.7, and the decimal point of a is moved one place to the right, it is exactly equal to B, what are a and B?
• 11. How to solve the equation x + 1 / 2 + 1 / x = the square of X + 32 / 2x It's 15 in the end
• 12. The square of (x-3) (2-x) (x + 1) (x + 2x + 4) is less than or equal to 0
• 13. When Y-X = 5 x ^ 2-y ^ 2 + 5x + 5Y + 2009 =?
• 14. If the quadratic power of (x-5y-16) + |5y-5x-4 | = 0, then x = (), y = ()
• 15. Factorization of x ^ 2-y ^ 2 + X + 5y-6
• 16. -Factorization of x ^ 2-5y (5y-2x)
• 17. Given x + y + 6x-4y + 13 = 0, find the value of (x + y) to the power of 2008 Such as the title, to the detailed process
• 18. Known: x2 + Y2 + 6x-4y + 13 = 0. Find the value of (x + y) 2008
• 19. Let x, y, a be rational numbers, define x * y = axy4x + 5Y, and 1 * 2 = 1, try to find the value of 2 * 3
• 20. X * y is 4x + 5Y divided into axy, and 1 * 2 = 1, find the value of 2 * 3 There must be an operation process, and every step must have one