Question

resolva a equação do 2 grau
a)5×^^+6×+1=0
b) 2×-6×+4=0

Answer 1

Boa noite

a)

5x² + 6x + 1 = 0

delta
d² = 36 - 20 = 16
d = 4

x1 = (-6 + 4)/10 = -2/10 = -1/5 
x2 = (-6 - 4)/10 = -10/19 = -1 

b)

2x² - 6x + 4 = 0
x² - 3x + 2 = 0

delta
d² = 9 - 8 = 1
d = 1

x1 = (3 + 1)/2 = 4/2 = 2
x2 = (3 - 1)/2 = 2/2 = 1