Question

Решите, пожалуйста)))

Answer 1

$frac{ x^{3} -5 x^{2} -9x+45}{(x-5)(x+3)} = frac{ x^{2} (x-5)-9(x-5)}{(x-5)(x+3)} = frac{( x^{2} -9)(x-5)}{(x-5)(x+3)} = frac{(x-3)(x+3)(x-5)}{(x-5)(x+3)} = \ \ =x-3$