Question

(2x-1)^3 = -125 Paso a paso


YAYYAYAYAAY

Answer 1

Respuesta:

(2x-1)^3=(-5)^3 (se va la potencia^3)

2x=-5+1

2x=-4

X=-2

Answer 2

Respuesta:

$\left(2x-1\right)^3=-125$

pasos:

$\\\left(2x-1\right)^3=-125\quad :\quad x=-2,\:x=\frac{7}{4}-i\frac{5\sqrt{3}}{4},\:x=\frac{7}{4}+i\frac{5\sqrt{3}}{4}\:2x-1=-5:\quad x=-2\\2x-1=-5\cdot \frac{-1+\sqrt{3}i}{2}:\quad x=\frac{7}{4}-i\frac{5\sqrt{3}}{4}\\\:2x-1=-5\cdot \frac{-1-\sqrt{3}i}{2}:\quad x=\frac{7}{4}+i\frac{5\sqrt{3}}{4}\\x=-2,\:x=\frac{7}{4}-i\frac{5\sqrt{3}}{4},\:x=\frac{7}{4}+i\frac{5\sqrt{3}}{4}$