Question

x (ao quadrado)+x-3=0 ??

Answer 1

x² + x - 3 = 0


delta = b² - 4.a.c

a = 1
b = 1
c = -3


delta = 1² - 4.1.(-3)
delta = 1 + 12
delta = 13

x = -b ± √delta/2.a

x = -1 ± √13/2.1

x = (-1 + √13)/2

x = (-1 - √13)/2


s={ (-1 + √13)/2, (-1 - √13)/2 }