Question

2x ao quadrado +5x +1 =0

Answer 1

(2x)^2+5x+1=0
4x^2+5x+1=0

∆=b^2-4.a.c
∆=5^2-4.4.1
∆=25-16
∆=9

X=-b+-√∆/2a
X=-5+-√9/2.4
X=-5+-3/8

X'=-5+3/8
X'=-2/8 dividido por 2
X'=-1/4

X"=-5-3/8
X"=-8/8
X"=-1