Resposta :
x²-3x+2=o
a=1, b=3, c=2
Δ =b²-4ac
Δ =3² - 4.1.2
Δ =9-8
Δ= 1
x= -b raiz deΔ /2.a
x =3 +ou- 1/ 2
x' 4/ 2 x= 2
x" = 1,5
a=1, b=3, c=2
Δ =b²-4ac
Δ =3² - 4.1.2
Δ =9-8
Δ= 1
x= -b raiz deΔ /2.a
x =3 +ou- 1/ 2
x' 4/ 2 x= 2
x" = 1,5