Question

determine a raiz e a coordenada da vértice y=3x²+4x

Answer 1

y=3x^2+4x
3x^2+4x=0
delta=b^2-4ac
delta=4^2-4.3.0
delta=16-0
delta=16
x=-b-/+ raiz de delta/2a
x=-4-4/2.3
x=-8/6 (:2)
x=-4/3
x=-4+4/2.3
x=0/6
x=0
xv=-b/2a
xv=-4/2.3
xv=-4/6 (:2)
xv=-2/3
yv=-delta/4a
yv=-0/4.3
yv=-0/12
yv=0
(-2/3, 0)