（4x²-9y²)(3y-2z)+9(2x+3y Factorization

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• 1. First simplify, then evaluate 3A & sup2; B - [2Ab & sup2; - 2 (ab-3 / 2 A & sup2; b)] + 2Ab 3A & sup2; B - [2Ab & sup2; - 2 (ab-3 / 2 A & sup2; b)] + 2Ab. Where a and B satisfy │ B + 1 │ + (2a-4) & sup2; = 0 (detailed process is required)
• 2. Simplification: (3a-2b) * (2a + 5b) =?
• 3. First simplify, then evaluate A-1 / A + 2 × a ^ 2-4 / A ^ 2-2a + 1 △ 1 / A ^ 2-1, where a satisfies a ^ 2-A = 0 (A-1 / A + 2) × (a ^ 2-4 / A ^ 2-2a + 1) / (1 / A ^ 2-1), where a satisfies a ^ 2-A = 0
• 4. First simplify, then evaluate: 1 / (a + 1) - (a + 3) / (a ^ 2-1) * (a ^ 2-2a + 1) / (a ^ 2 + 4A + 3), where a satisfies a ^ 2 + 2a-1 = 0
• 5. First simplify and then evaluate: (2a + 1) ^ 2 - (2a + 1) (2a-1), where a = change sign 5-1 / 2
• 6. Simplified evaluation: 3 (a + 1) ^ 2 - (a + 1) (2a-1) where a = 1 It's simplified evaluation!
• 7. Simplify evaluation 3 (a + 1) ^ 2 - (2a + 1) (2a-1), where a = 1
• 8. First simplify, then evaluate: (A-1) / a △ {a - (2a-1) / a}, where a = √ 3 + 1 First simplify, then evaluate: (A-1) / a △ {a - (2a-1) / a}, where a = √ 3 + 1
• 9. 1. First simplify, then evaluate a - {b-2a + [3a-2 (B + 2a) + 5B]}, where a = 2009, B = 2010 2. Given X & sup2; + xy = 2, Y & sup2; + xy = 5, what is the value of 1 / 2x & sup2; + XY + 1 / 2Y & sup2? 3. If - 0.2A (3x power) B & sup3; and 1 / 2A & sup2; B (y power) are of the same kind, Find the value of the algebraic formula 3xy & sup2; - [2x & sup2; Y-2 (xy-3 / 2XY & sup2;) + XY] + 3x & sup2; y
• 10. 3a-5b-2a + B simplification
• 11. Given - 3Y = x + 2Z, find the value of X & sup2; - 9y & sup2; + 4Z & sup2; + 4XZ
• 12. （2x-3y）²（2x+3y）²（4x²+9y²）² Simplification
• 13. a. B and C are rational numbers, and the positions on the number axis are shown in the figure below, then the result of | a | + | B | + | a + B | + | B-C | reduction is () ----------－1---a---0-------1---b---c----▷
• 14. The position of known rational numbers on the number axis is shown in the figure, which is simplified as follows: | a + B | - | A-B | - | - B |
• 15. The position of rational number a, B and C on the number axis is shown in the figure, which is simplified as follows: a + B + A + B + B-C - A + 1 As shown in the figure: —————1——a——0———1—b——c—————————————
• 16. When multiplying two fractions, if the numerator or denominator is a polynomial, what should be done first
• 17. How to deal with the operation of fractions if the numerator denominator is a polynomial? What are the advantages?
• 18. Is the numerator and denominator of the simplest fraction required to be in the form of multiplication of various factors, or in the form of polynomials, or both Is the numerator and denominator of the simplest fraction in the form of multiplication of factors or polynomial? Or is it all ok
• 19. Write three fractions so that their simplest common denominator is x (x + y) (X-Y). All denominators are polynomials, and one of them cannot contain a factor (x + y)
• 20. Can the numerator and denominator in the result of fractional operation be in the form of product or polynomial? Is there any unified regulation?