Respostas

2014-08-04T18:58:25-03:00
Olá Lohanna,

x^2(x^2-6)=3(x^4-2x^2).\\
x^4-6x^2=3x^4-6x^2\\
x^4-3x^4-6x^2+6x^2=0\\
-2x^4=0\\
(-2x^2)^2=0\\\\
x^2=k\\\\
-2k^2=0\\\\
k^2= \dfrac{~~0}{-2}\\\\
k^2=0\\
k=\pm \sqrt{0}\\\\
k=\pm0\\\\
k'=k''=k'''=k''''=0\\\\
\large\boxed{S=\{0,0,0,0\}}

Tenha ótimos estudos =))
1 5 1