Question

(2-х)/(х+3) + 25/(х-12)

Answer 1

Объяснение:

$\frac{(2 - x)}{x + 3} + \frac{25}{(x - 12)} = \frac{(x - 12) \times (2 - x) + 25(x + 3}{(x + 3) \times (x - 12)} = \frac{2x - x {}^{2} - 24 + 12x + 25x + 75 }{x {}^{2} - 12x + 3x - 36} = \frac{39x - x {}^{2} + 51}{x {}^{2} - 9x - 36 } = \frac{ - x {}^{2} + 39x + 51}{x {}^{2} - 9x - 36 }$