Respostas

2014-08-04T16:21:07-03:00
Dois numeros impares consecutivos x, x + 2
x . x+2 = 143
x² + 2x = 143
x² +2x - 143 = 0
Δ = b² - 4.a.c
Δ = 2² + 572
Δ = 576

-b +/- √Δ
-------------
   2a
- 2 +/- √ 576
 ----------------
       2
-2+/- 24
----------
     2
x` = 11 
x" = - 13
11 e 13
-13 e -11
2 4 2