1. If a ＜ 3, simplify the algebraic formula 4 - │ 2a-6= 1. If a ＜ 3, simplify the algebraic formula 4 - │ 2a-6= 2. If the polynomial (2mx & # 178; - X & # 178; + 3x + 1) - (5x & # 178; - 4Y + 3x) exists, the value of this polynomial has nothing to do with the value of X. if it does not exist, please explain the reason. If it exists, ask for the value of M which satisfies the condition

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• 1. The known real number a satisfies: (A-3) &# 178; = (2a + 6) &# 178 (1) Find the value of A (2) If the real number B satisfies: (a + b) cube root = - 2, find the value of B Please answer in understandable language
• 2. Finding the minimum value of a & # 178; - 2a-6
• 3. It is known that the ternary linear equation 2A + 3b-4z = 8, and Z is expressed by the algebraic formula containing a and B____________
• 4. If the three sides of a triangle a B C satisfy a Λ 2b-a Λ 2c-ab Λ 2 + AC Λ 2 + B Λ 2C_ BC ∧ 2 = 0, judge the shape of triangle
• 5. 1. If the positive numbers a, B and C are three sides of the triangle and satisfy a ^ 4 + B ^ 4 + C ^ 4 = a ^ 2B ^ 2 + B ^ 2C ^ 2 + A ^ 2C ^ 2, try to determine the shape of the triangle 2. Decomposition factor A ^ 2 + B ^ 2 + C ^ 2 + 2ab-2ac-2bc 3. Factorization-4z ^ 2 + 4z-1
• 6. Given that the formula ratio of the equal ratio sequence ABCD is 2, then 2A + B / 2C + D is?
• 7. It is known that a, B, C and D are equal ratio sequence with common ratio of 1 / 2, then (2a + b) / (2C + D) =? Process
• 8. Given that a, B, C and D are equal ratio sequences with 2 as common ratio, what is (2a + b) / (2C + D)?
• 9. Given that a, B, C and D are equal ratio sequences with common ratio 2, then 2A + B2C + D = () A. 1B. 12C. 14D. 18
• 10. Given that a, B, C and D are equal ratio sequences with common ratio 2, then 2A + B2C + D = () A. 1B. 12C. 14D. 18
• 11. a. B and C each represent a number, and 2A = 3C = 4b, a + 2B + C = 400 calculate ABC
• 12. 1. (8a ^ 4B ^ 3C) divide by (2a ^ 2B ^ 3) multiply by (- two thirds a ^ 3bC ^ 2) 1. (8a ^ 4B ^ 3C) divide by (2a ^ 2B ^ 3) multiply by (- two thirds a ^ 3bC ^ 2) 2. (3x ^ 2Y) ^ 2 multiply by (- 15xy ^ 3) divide by (- 9x ^ 4Y ^ 2)
• 13. Calculate 1 / 2 (3a-2ab + 4b) - 2 (3 / 4-ab-3b)
• 14. Find the common denominator of 2 / 3A ^ 2 + 3 / 4b-5 / 6ab and calculate it
• 15. Calculation: - 2 (3a-4b)
• 16. What is 3A + 4B = 6.2, 2A + 5B = 6
• 17. 5x + y = 2x + 3Y find X: y
• 18. 5x-3y=7 2x+y=5 Solve the equations,
• 19. (x+3y)(2x-y)-y(5x-3y)
• 20. 5x-y=3 2x+3y=-9 Calculation by addition subtraction elimination method These two are a system of equations of second degree 6s=27-5t ｛ 3s+4t=18 Calculation by addition subtraction elimination method