When multiplying two fractions, if the numerator or denominator is a polynomial, what should be done first

When multiplying two fractions, if the numerator or denominator is a polynomial, it should be reduced to the simplest fraction first, then the numerator and denominator are multiplied separately

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1. 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—————————————
2. 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 |
3. 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----▷
4. （2x-3y）²（2x+3y）²（4x²+9y²）² Simplification
5. Given - 3Y = x + 2Z, find the value of X & sup2; - 9y & sup2; + 4Z & sup2; + 4XZ
6. （4x²-9y²)(3y-2z)+9(2x+3y Factorization
7. 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)
8. Simplification: (3a-2b) * (2a + 5b) =?
9. 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
10. 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
11. How to deal with the operation of fractions if the numerator denominator is a polynomial? What are the advantages?
12. 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
13. 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)
14. Can the numerator and denominator in the result of fractional operation be in the form of product or polynomial? Is there any unified regulation?
15. Operation of polynomials (Mathematics) 1. It is shown that for any positive integer n, the value of formula n (n + 5) - (n-3) (n + 2) can be divisible by 6 2. If the product of (X & # 178; + PX + 8) (X & # 178; - 3x + Q) does not contain X & # 178; and X & # 179; terms, find the value of P, Q 3. If 3x & # 179; - x = 1, find the value of 9x Λ 4 + 12x & # 179; - 3x & # 178; - 7x 4. It is known that: X-Y = 4, X & # 178; + Y & # 178; = 26, please find the values of: X Λ 4 + y Λ 4, X Λ 8 + y Λ 8, X Λ 4-y Λ 4 respectively
16. How to calculate the degree of polynomial
17. The calculation of mathematics polynomials in Grade Seven (1 + 1 / 2) × (1 + 1 / 2 & # 710; 2) × (1 + 1 / 2 & # 710; 4) × (1 + 1 / 2 & # 710; 8) + 1 / 2 & # 710; 15_ Thank you
18. How to calculate the degree of polynomials in the integral of junior high school mathematics volume 2
19. The pseudo fraction M & # 178; + 1 / M-1 is reduced to the sum of integral and true fraction
20. How to convert a false fraction into the sum of an integer and a true fraction? For example, how to change the false fraction 4x + 3 / 2x + 1 into the sum of an integer and a true fraction?