Question

Resolver:

1.000 ÷ 20 + 30 x 4 = 80​

Answer 1

Respuesta:

$x=\{1,-1,i,-i\}$

Explicación paso a paso:

$1.000 / 20 + 30 x^4 = 80\\50+30x^4=80\\50+30x^4-80=0\\30x^4-30=0\\30*(x^4-1)=0\\x^4-1 = 0\\(x^2-1)(x^2+1)=0\\(x-1)(x+1)(x-i)(x+i)=0\\x=1\\x=-1\\x=i\\x=-i$