Question

4) Escreva na forma geral e Resolva as Equações do 2° grau.​

Answer 1

x²+3x/6=2/3

(x²+3x).3/6=2

x²+3x/2=2

x²+3x=2.2

x²+3x=4

x²+3x-4=0

a=1, b=3 e c=-4

∆=b²-4.a.c

∆=3²-4.1.(-4)

∆=9+16

∆=25

x=-b±√∆/2.a

x'=-3-√25/2.1=-3-5/2=-8/2=-4

x"=-3+√25/2.1=-3+5/2=2/2=1