Respostas

2013-11-08T21:34:18-02:00
-x² - (+1) = 0
= -x² - 1 = 0 (-1)
x² + 1 = 0
a = 1
b = 0
c = 1

5x - 2x² = 2
= -2x² + 5x - 2 = 0 (-1)
= 2x² - 5x + 2 = 0
a = 2
b = -5
c = 2

3x² - 3x + 0 = 0
a = 3
b = -3
c = 0

2x² +7x + 3 = 0
a = 2
b = 7
c = 3