Упростите дроби:

а)√3-3/3√2-√6

б)9a-b²/9a-6b√a+b²

а) √ 3-3

3√2-√6

√3-3 3√2+√6

×

3√2-√6. 3√2+√6

(√3-3)×(3√2+√6)

(3√2-√6)×(3√2-√6)

3√6+√18-9√2-3√6

9×2-6

3√2-9√2

18-6

-6√2

12

-√2

2

√2

- ——

2

б) 9а-b²

9a-6b√a+b²

(3√a-b)×(3√a+b)

(3√a-b)²

3√a+b

3√a-b

3√a+b. 3√a+b

×

3√a-b 3√a+b

(3√a+b) × (3√a+b)

(3√a-b) × (3√a+b)

(3√a+b)²

9a-b²

9a+6b√a+b²

9a-b

(х-1)/(х+-х)/(х^2+3х+2) = ((x-1)(x+1) - (1-x))/((x+1)(x+2)) = (x^2+x-2)/((x+1)(x+2))=((x-1)(x+2))/((x+1)(x+2))=(x-1)/(x+1)