Respostas

2014-08-13T19:35:42-03:00
(x - 2)^2 = 3x + 4

x^2 - 4x + 4 = 3x + 4

x^2 - 4x - 3x = 4 - 4

x^2 - 7x = 0

x (x - 7) = 0

x = 0 ou

x - 7 = 0 -> x = 7

2014-08-13T19:38:35-03:00
(x -2)² = 3x +4
x² +4 = 3x +4
x² -3x = 4 -4
x² -3x = 0
x(x -3) = 0
 
x = 0

3x-1 = 0
3x = 1
x =  \frac{1}{3}

S= {0,  \frac{1}{3} }