Calculation: 5 (2x-7y) - 3 (4x-3y)

RELATED INFORMATIONS

• 1. The equations 3x-y = 2,4x + 3Y, XY are () () Sorry ~ 3x-y = 2,4x = 3Y = 1 hey hey
• 2. Is there such an integer a that the solution of the system of equations 3x + 4Y = a4x + 3Y = 5 is a pair of non negative numbers? If it exists, find its solution; if it does not exist, give the reason
• 3. -If the sum of 2A ^ XB ^ 2-y and 1 / 2A ^ 2B ^ 5 is a monomial, then the value of polynomial 1 / 2x ^ 3-1 / 6xy ^ 2 + 1 / 3Y ^ 2 is____ ?
• 4. Given that the sum of - 2A ^ 2B ^ x + y and 1 / 3A ^ XB ^ 5 is still monomial, find the value of 1 / 2x ^ 3-1 / 6xy ^ 2 + 1 / 3Y ^ 3
• 5. 1. If the sum of 2x ^ 5A y ^ B + 4 and - 1 / 2x ^ 1-2b y ^ 2a is still a monomial, then B ^ A=_______ .
• 6. Factorization 1-4x square-4y square + 8xy
• 7. Decomposition factor: x2-2xy-8y2-x-14y-6=______ ．
• 8. Factorization: x2-9a2 + 12a-4; X2Y + 3xy2-x-3y; 1-x2-2xy-y2; 3a2 + 2b-2ab-3a; x2 + Y2 + 2XY + ax + ay; 3x4-48y4 8a3-4a2-2a+1；x2-3xy-28y2；(x2-x)^2-4(x2-x)-12
• 9. Factorization of 2x-4xy-5y square in real numbers Ah, I haven't done this kind of question for several years. I forgot how to do it. It's a tragedy
• 10. Factoring factors in real numbers: 2x squared - 4xy-5y squared
• 11. Calculation: 1. (- 2x-7y) ^ 2. (- 4x-3y) (4x-3y) 3. (- 1 / 2A + 2b) (1 / 2a-2b) 4. (A / 3 + 3) ^ 2 + (A / 3-3) ^ 2 5. (- x-y-1) (x-y-1) Simple operation 1.103×97-104^2 2.2012^2-2013×2011
• 12. It is known that 10-6y-4x = 4. Find the value of formula 2x + 3Y + 7
• 13. Solve the linear equation 4x-3z = 17, 3x + Y5z = 18, x + 2Y + Z = 2
• 14. It is known that the absolute value of XY-2 is opposite to that of Y-1 Try to find the value of 1 ＋ (x + 1) (y + 1) of XY ＋ (x + 2) (y + 2) of XY ＋... + (x + 2014) (y + 2014) of XY
• 15. It is known that / XY - 2 / (this is the sign of absolute value) and / Y - 1 / are opposite numbers (1) Find the value of X and y; (2) Find 1 / (this is the fractional sign) XY + 1 / (x + 1) (y + 1) + 1 / (x + 2) (y + 2) +... + 1 / (x + 2009) (y + 2009)
• 16. Given that the absolute value of XY-2 and the absolute value of Y-1 are opposite to each other, try to find the value of the algebraic formula
• 17. When the independent variable of a quadratic function is 0, the function value is 1, and when the independent variable is equal to - 1 and 2, the function value is 0, then the analytic expression of the quadratic function is
• 18. In the function y = x to the power of 0 + √ x, the value range of the independent variable x is ()
• 19. In the function y = X-2 √ 4-x, the value range of independent variable x is ()
• 20. Function y = x + 2 / 1, the value range of independent variable x