The square of a - 3AB + 9b, where a = - 2, B = two-thirds of the value is

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• 1. Given A-B = 4, ab = - 1, find the value of formula a + 3ab-b
• 2. Given a + B = 1, A-B = - 3, find the value of a 2 + 3 AB + B 2
• 3. A ^ 2 + 4ac + 3C ^ 2-3ab-7bc + 2B ^ 2 factorization time
• 4. First simplify and then evaluate 1A / 2 minus (2a minus the square of 2B / 3), where a is negative and 1B / 2 equals 1
• 5. Answer and explanation of question 8 on page 37 of mathematics book of Tianjin primary school fifth grade people's Education Press There is no wonder in the world. Alas~~~
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• 9. It's due on March 14 1. The sum of five continuous natural numbers is so 135. These five continuous natural numbers are () 2. The sum of five consecutive odd numbers is so 135, the five consecutive odd numbers are () 3. The sum of five consecutive even numbers is so 135, the five consecutive even numbers are () And the second one won't. whoever answers the second question correctly will be offered a reward
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• 11. The square of a - AB = 3, the square of 4ab-3b = - 2, then the square of a + the square of 3ab-3b is
• 12. If x = 1, the value of cube + 3bx + 4 of algebraic formula 2aX is 5, then what is the value of cube + 3bx + 4 of algebraic formula 2aX when x = - 1?
• 13. When the fractional equation 2XX − 1 − 5x − 5x + 3 = 0 is solved by the substitution method, if XX − 1 = y, then the original equation can be reduced to () A. 2y2+3y-5=0B. 2y2-5y+3=0C. y2+3y-5=0D. y2-5y+3=0
• 14. Given the equation x & sup2; + 2 (2-m) x + 3-6M + 0 about X, if two real roots X1 and X2 of the equation satisfy the condition X1 = 3x2, find the value of real number M
• 15. If (K-4) X2 (the square of x) + (K-2) x + 3Y = 1 is a quadratic equation with respect to x, y, then k =?
• 16. Weida theorem | x1-x2| X1 and X2 are two steps of the quadratic equation 2x ^ + 5x-3 = 0 with one variable. The process of finding the value of | x1-x2 | is written by WIDA's theorem
• 17. Let X1 and X2 be the two roots of the equation 2x + 4x-3, then (x1 + 1) (x2 + 1) and X1 + x2
• 18. If the square of the quadratic equation 2x minus 4x plus 3 = 0 is x1, X2, then x2 divided by X1 plus X1 divided by x2 =? .
• 19. The formula method is used to solve the quadratic equation AX + BX + C = 0 (a is not equal to 0)
• 20. Solve the equation [3x + 1] = 2x-0.5, where [] is the integer sign