x (x+2)(x+4) +x³ = 2(x+1)³ aplicas propiedad distributiva
x (x² + 4x + 2x + 8) + x³ = 2(x+1)³
x(x² + 6x + 8) + x³ = 2(x +1)³ resolves el cuatrinomio
x³ + 6x² + 8x + x³ = 2 (x³+ 3x² + 3x + 1)
2x³ + 6x² + 8x = 2x³ + 6x² + 6x + 2
2x³ + 6x² + 8x - 2x³ - 6x² - 6x = 2
8x - 6x = 2
2x = 2
x = 2/2
x= 1
Espero que te sirva, salu2!!!!
