Raíces cúbicas de expresiones compuestas.

4. $-{\displaystyle \frac{2ax}{a-x}}$.

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

6. $-{\displaystyle \frac{2x^2-6x+5}{x-2}}$.

7. ${\displaystyle \frac{x^3+x^2-2x+1}{x+2}}$.

8. ${\displaystyle \frac{2a^2-11a+6}{a-3}}$.

9. ${\displaystyle \frac{-2a^3+a^2+2a-3}{a-1}}$.

10. ${\displaystyle \frac{3a^4+6a^3-14a^2-4}{3a^2+1}}$.

[1]Ejercicio45.

1. ${\displaystyle \frac{x(x+a)}{(x+a)(x-a)}}$, ${\displaystyle \frac{x^2}{(x+a)(x-a)}}$.

2. ${\displaystyle \frac{a(a-b)}{(a+b)(a-b)}}$, ${\displaystyle \frac{a^2}{(a+b)(a-b)}}$.

3. ${\displaystyle \frac{1-2a}{(1+2a)(1-2a)}}$, ${\displaystyle \frac{1}{(1+2a)(1-2a)}}$.

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

5. ${\displaystyle \frac{a^2}{(3-a)(9+3a+a^2)}}$, ${\displaystyle \frac{a(9+3a+a^2)}{(3-a)(9+3a+a^2)}}$.

6. • ${\displaystyle \frac{x+2}{(x+2)(x-2)(x-3)}}$,
   • ${\displaystyle \frac{x-2}{(x+2)(x-2)(x-3)}}$.

Ejercicio46.

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

2. ${\displaystyle \frac{13x+3}{12}}$.

3. ${\displaystyle \frac{5(9x-13)}{42}}$.

4. ${\displaystyle \frac{51x+31}{36}}$.

5. ${\displaystyle \frac{x-5}{3}}$.

6. ${\displaystyle \frac{5(x-y)}{8x}}$.