Question

ayudaa porfavor es efectúa​

Answer 1

Explicación paso a paso:

b)

$\frac{1}{ {y}^{2} + 2y + - 24} + \frac{ {2} }{ {y}^{2} - 2y - 8 } - \frac{3}{ {y}^{2} + 8y + 12 }$

$\frac{1}{(y + 6)(y - 4)} + \frac{2}{(y - 4)(y + 2)} - \frac{3}{(y + 2)(y + 6)}$

$\frac{(y + 2) + 2(y + 6) - 3(y - 4)}{(y + 2)(y + 6)(y - 4)}$

$\frac{26}{(y + 2)(y + 6)(y - 4)}$

c)

$\frac{x + 1}{ {x}^{2} - x - 20} - \frac{x + 4}{ {x}^{2} - 4x - 5} + \frac{x + 5}{ {x}^{2} + 4x+ 5}$

$\frac{x + 1}{(x - 5)(x + 4)} - \frac{x + 4}{(x - 5)(x + 1)} + \frac{x +5 }{(x + 4)(x + 1)}$

$\frac{(x + 1)(x + 1) - (x + 4)(x + 4) + (x + 5)(x - 5)}{(x + 1)(x + 4)(x + 5)}$

$\frac{ {x}^{2} + 2x + 1 - {x}^{2} - 8x - 16 + {x}^{2} - 25 }{(x + 1)(x - 5)(x + 4)}$

$\frac{ {x}^{2} - 6x - 40}{(x + 1)(x + 4)(x - 5)}$

$\frac{x - 10}{(x + 1)(x - 5)}$

d)

$\frac{x + 2}{x + 4} + \frac{2x + 3}{x + 4} - \frac{3x - 3}{x + 4}$

$\frac{x + 2x - 3x + 2 + 3 + 3}{x + 4}$

$\frac{8}{x + 4}$