x² + x - 2 = 0
a = 1 b = 1 c = - 2
/\ = b² - 4ac
/\ = 1² - 4 * 1 * (- 2)
/\ = 1 + 8
/\ = 9
x = - b + V¨¨¨/\
-----------------
2a
x = - 1 + V¨¨¨9
------------------
2 * 1
x = - 1 + 3
-------------
2
x' = - 1 + 3
2
x' = 2 : 2
x' = 1
x" = - 1 - 3
2
x" = - 4 : 2
x" = - 2
Resposta: {1, - 2}
