What is (2x square y + 3xy Square) - (6x square y-3xy Square) equal to

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• 1. Simplification: (2x2y-3xy2) - (6x2y-3xy2)
• 2. Calculate (3xy2-6x2y) / (- 2x) =___ ．
• 3. Calculate (3xy2-6x2y) / (- 2x) =___ ．
• 4. Simplification: - (square of X - square of Y) + [- 3xy - (square of X + square of Y)]: Xy - {the square of 1 / 2x - [the square of 3y-2 (the square of xy-3y) - 1]} If we know the square of a = 2A - 3AB, B = the square of a + 2Ab, we can find:
• 5. First simplify and then evaluate: - (x2 + Y2) + [- 3xy - (x2-y2)], where x = - 1, y = 2
• 6. First simplify, then evaluate: - (square of X + square of Y) + [- 3xy - (square of X - square of Y)], where x = - 1, y = 2
• 7. 2,4 of 5,9 of 10,16 of 17, find the law
• 8. When the real number m takes what value, the equation 4x + (m-2) x + (m-5) = 0 has: (1) the absolute value of positive root is greater than that of negative root When m is a real number, the equations 4x + (m-2) x + (m-5) = 0 are as follows: (1) Is the absolute value of positive root greater than that of negative root? (2) Both are greater than 1?
• 9. If the absolute value of equation - X & # 178; + 4x-3 = KX has three real solutions, then K=
• 10. If there are exactly three different real solutions to the equation of X: the second power of X - 2 times the absolute value of X + 2 = m, please guess the value of M and verify it
• 11. Find (the square of 2x - 3xy + the square of 4Y + the square of 4Y) x (- 2XY)
• 12. The coefficient of the quadratic power of X and YZ
• 13. -The degree of 2 / 3x square YZ is () and the coefficient is () The square of xy-y + the square of 2x is ()
• 14. What is the coefficient of the cube of the square B of minus 3 / a? What is the degree?
• 15. The coefficient of "3 / 2 of negative axis" I'll die if I don't preview The coefficient of minus one third of the square of axis Can it be written as - 1 / 3 Can you write down the problem that coefficient should pay attention to -How did one third come from
• 16. Simplification: (5x-3y + 2XY) - (6x + 4x-3xy)
• 17. (-4x(2xy+3xy^2)+12(x^2y)^2y^3)÷（-6xy）
• 18. Calculate (2xy-1) (2-3xy) for me,
• 19. X ^ y times (2xy-3xy ^ 2)=___________________ =________________
• 20. Calculate 3xy [2xy-x (Y-2) + X-1]