On distinguishing quadratic radical In the following formulas, what is not quadratic radical is: ("√" means "under the root sign") ("& sup2;" means square) A√35 B√3-π C√b²+4 D√2/7

B
3-π

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1. Judge whether the following forms are the simplest quadratic radicals: √0.2a,√3ab,√18a²b（a≥0）,1/ab√ab
2. Help me judge if this is the simplest quadratic radical Tick (A & # 178; + B & # 178;) (the square of a under the root plus the square of B) urgent!
3. Basic properties of fraction: the numerator and denominator of fraction are multiplied by (or divided by) the same integral which is not equal to zero, and the value of fraction remains unchanged, which is expressed as
4. In the formula, what conditions should the numerator and denominator satisfy to make their values zero
5. The condition of positive value of fraction: (denominator ≠ 0) the condition of negative value:
6. Is it a fraction to reduce the letters in the denominator Is 3A / a a fraction
7. Is it a fraction only if the denominator is a letter
8. The relationship between monomials and polynomials contained in integers
9. The judgment of fraction! Is 1 / x + 1 / Y2 a fraction?
10. Fractional discriminant Generally, if a and B represent two integers and B contains letters, then the algebraic expression a / B is called a fraction Why is B / 2 π not a fraction? Because Pi is a mathematical symbol, isn't it a letter?
11. A + 2B = 22b + 3C = 3C + 3A = 7, find the solution of a + B + C
12. 2a-b-(-3a)+2b-(-3c)-|a|-|b|+|c| Just simplify
13. N is the number in 4,6,8,12,16,18_______ When √ N and √ 2 are quadratic radicals of the same kind What's in the blank? I don't understand the blank. I understand what you say
14. If 1 / 2 √ (2-A) / 6 and 3 √ (2a-3) / 4 are quadratic radicals of the same kind, then the value of a is ()
15. If the A-B power of & # 178; √ 4A + B and √ 23 is the same kind of quadratic radical, find the value of √ a + B / 1
16. The second radical xYx (Y > 0) is reduced to the simplest second radical xYx (Y > 0)___ ．
17. Reduced to the simplest quadratic radical √ 20x & # 178; Y (x > 0)
18. The following quadratic radical is reduced to the simplest one: radical [2 / 5 (x + y)] (x > 0, Y > 0)
19. Is it the simplest quadratic radical
20. Which is the simplest quadratic radical