Respostas

2014-04-13T20:09:04-03:00
.-. so aplicar bhaskara.
vai dar ...
(-b + Raiz de b²-4ac) / 2a
Substituindo (-(-10)+raiz de 100-4x-56x1)2
(+10 + raiz de 324) / 2
(+10(+-)18)/2
x1=(10+18)/2 = 28/2=14
x2=(10-18)/2 = -8/2 = -4
2014-04-13T20:09:26-03:00
X²-10x-56=0

delta = b² - 4ac
delta = (-10)² - 4x 1 x (-56)
delta = 100 + 224
delta = 324

x1 = 10 + 18 / 2  => 14
x2 = 10 - 18 /2   =>  -4
1 4 1