Resposta :
Igual o anterior
x² - 30x - 200 = 0
delta = (-30)^2 - 4(1)(-200) = 900 + 800 = 1700 = 17.100
raiz delta = 10(raiz de 17)
x = [30 + 10(raiz de 17)]/2 = 15 + 5(raiz de 17) x1 = 15 + 5(raiz de 17)
x = [30 - 10(raiz de 17)]/2 = 15 - 5(raiz de 17) x2 = 15 - 5(raiz de 17)
S = (15 - 5(raiz de 17), 15 + 5(raiz de 17))