Respostas

2013-08-26T14:45:37-03:00
Num sei se esta certo:

(x-3)²-(x+2)²+(x+3) (x-1)
(x-5)²+(2x+2)
2 1 2
2013-08-26T14:45:45-03:00
(a - b)² = a² - 2ab + b²
(a + b)² = a² + 2ab + b²

(x - 3)² + (x + 2)² = 10
x² - 6x + 9 + x² + 4x + 4 = 10
2x² - 2x + 13 = 10
2x² - 2x + 3 = 0

3 1 3