Question

Calcule as raizesda equação x-1 -3x-x2=1

Answer 1

x - 1 - 3x - x² = 1
-2x - 1 - x² - 1 = 0
-x² - 2x - 2 = 0
x² + 2x + 2 = 0
delta = 4 - 4 = 0
delta = 0   2 raizes  iguais
x = -b/2a  = -2/2 = - 1 ****
x1 = x2 = - 1 ***