Question

Dupa simplificarea raportului x la 2+3x-4 supra x la 2-x-20 devine............ repede cat mai urgent

Answer 1

$\frac{ {x}^{2} + 3x - 4 }{ {x}^{2} - x- 20} = \frac{ {x}^{2} + 4x - x - 4 }{ {x}^{2} + 4x - 5x - 20} = \frac{x(x + 4) - (x + 4)}{x(x + 4) - 5(x + 4)}$

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