Question

x ao quadrado + x-7=5

Answer 1

x² + x - 7 = 5
x² + x - 7 - 5 = 0

x² + x - 12 = 0


delta = b² - 4.a.c

a = 1
b = 1
c = -12


delta = 1² - 4.1.(-12)
delta = 1 + 48
delta = 49


x = -b ± √delta/2.a


x = -1 ± √49/2.1

x = -1 ± 7/2

x = -1 - 7/2 = -8/2 = -4

x = -1 + 7/2 = 6/2 = 3


s={ -4, 3 }



☆Espero ter ajudado! tmj