Respostas

2014-07-12T21:24:14-03:00
X² - (2x)² = - 36
x² - 4x² = - 36
-3x² = - 36
 3x² = 36
 x² = 36/3
x² = 12
x = raiz de 12
2014-07-12T21:25:10-03:00
X^2-2x^2=-36
-x^2=-36 (x1)
x^2=36
x=√36
x=6