Respostas

2014-05-22T20:04:16-03:00
-2x² + x = x => -2x² + x - x = 0 => -2x² = 0 => x = 0
2014-05-22T20:05:51-03:00
-2x²+x-x=0
-2x²=0 (-1)
2x²=0
x²=0/2

X²=0
x= raiz de 0
x= 0 

Espero q esteja certo, bom estudo :)