Verified answer

Resposta:

Explicação passo a passo:

2x²+x-3=0

a=2

b=1

c=-3

x=-1+-V1²-4.2.3/2

x=-1+-V1+24/2

x=-1+-V25/2

x=-1+-5/2

x'=-1-5/2=-6/2=-3

x''=-1+5/2=4/2=2

S={2,3}