Question

3+2x-x al cuadrado = x a la tercera

Answer 1

Respuesta:

$3 + 2x - {x}^{2} = {x}^{3} \\ {x}^{3} = 3 + 2x - {x}^{2} \\ {x}^{3} + {x}^{2} = 3 + 2x - {x}^{2} + {x}^{2} {x}^{3} + {x}^{2} = 3 + 2x \\ {x}^{3} + {x}^{2} - 2x = 3 \\ {x}^{3} + {x}^{2} - 2x - 3 = 3 - 3 \\ {x}^{3} + {x}^{2} - 2x - 3 = 0 \\ \frac{ {x}^{3} + {x}^{2} - 2x - 3 }{x - 1.54} = {x}^{2} + 2 \\ x = 1.546$