Respostas

2013-12-14T20:50:02-02:00
Aplicando baskara

-1² - 4 * 1 * -156 
Delta = 1 + 624 = 625

achando as raizes
-b +- raiz de delta sobre 2 a

1 + - 25 / 2   
x1 =  1+25 / 2 = 13
x2 = 1-25 /2 = -12 
2 5 2
2013-12-14T21:23:17-02:00
x²-x-156=0
-Resolvendo por Bhaskara, temos:
Δ= b²-4·a·c
Δ= (-1)²-4·1·(-156)
Δ= 1 - (-624)
Δ=625

Encontrando as raízes, temos:
x= -b +/- √Δ/2a
x= - (-1) +/-√625/2·1
x= 1+/- 25/2

x'= 26/2
x'= 13

x''= -24/2
x''= -14

S:[ -14,13]