Question

quaanto que e 2x elevado al quadrado +5x+3=0

Answer 1

2x(2)+5x+3=0
a=2 b=5 c=3

/\=5(2)-4.2.3
/\=25-24
/\=1

x=-b+- {raiz de /\} /2.a
x=-5+- {raiz de 1} /2.2
x=-5+-1/4
x'=-5+1/4=-4/4=-1
x''=-5-1/4=-6/4=-3/2

S={-1,-3/2}