Question

Me ajudem nas questão 15 e 16.

Answer 1

a) a=1    b=-6     c=4      Δ=b²-4ac                        yv=-Δ/4axv=-b/2a                                      Δ=(-6)²-4.1.4                  yv=-20/4.1
xv=-(-6)/2.1                                      Δ=36-16                         yv=-20/4
xv=6/2
xv=3                            Δ=20                                yv=-5
Os vértices são3 e -5
b0