Raíces cúbicas de expresiones compuestas.

4. ${\displaystyle \frac{x-10y}{4x^2-25y^2}}$.

5. ${\displaystyle \frac{2}{x+4y}}$.

6. ${\displaystyle \frac{2(x+6)}{4x^2-9}}$.

Exercise49.

1. ${\displaystyle \frac{20}{3bc}}$.

2. ${\displaystyle \frac{2ay}{3}}$.

3. ${\displaystyle \frac{7p^2}{4xz}}$.

4. ${\displaystyle \frac{2a^{2}cm}{7}}$.

5. ${\displaystyle \frac{30}{abc}}$.

6. $abc$.

7. $b^2$.

8. ${\displaystyle \frac{x+a}{x-2a}}$.

9. ${\displaystyle \frac{xy}{2c-1}}$.

10. ${\displaystyle \frac{a+10}{a+3}}$.

11. ${\displaystyle \frac{3x+2y}{x-2}}$.

12. ${\displaystyle \frac{5a+b}{4a+3b}}$.

13. ${\displaystyle \frac{x-7}{a+b+c}}$.

14. ${\displaystyle \frac{x(x+1)}{x-5}}$.

15. ${\displaystyle \frac{a+1}{a+5}}$.

16. $1$.

17. ${\displaystyle \frac{x(x+y)}{x+1}}$.

18. ${\displaystyle \frac{b}{a-b}}$.

19. $abc$.