Question

(x+1)(x+5)=(x+3)(x-4)+3 indica el valor de x^3 +1

Answer 1

Resolver.

(x + 1)(x + 5) = (x + 3)(x - 4) + 3

x² + 6x + 5 = x² - x - 12 + 3

x² + 6x + 5 = x² - x - 9

6x + x = - 9 - 5
 
     7x =  - 14

       x = - 14/7
 
       x = - 2

Hallar :

x³ + 1 ==> (- 2)³ + 1 => - 8 + 1 = - 7<== respuesta.

$(-)^{impar} = +$