Question

Matemática:

Utilize as coordenadas do vértice V ( Xv , Yv)


Me ajudem por favor ​

Answer 1

i) y=x²-3x+4

∆=(-3)²-4.1.4 =9-16=-7

xv=-b/2a=-(-3)/2.1=3/2

yv=-∆/4a =-(-7)4.1=7/4

V=(3/2,-7/4)

j)

y=x²-4x+5

∆=16-20=-4

xv=-(-4)/2.1=4/2=2

yv=-(-4)/4.1=4/4=1

V=(2,1)

k) y=x²-5x+7

∆=25-28=-3

xv=-(-5)/2.1=5/2

yv=-(-3)/4.1=3/4

V=(5/2,3/4)

l) y=x²-9x+25

∆=81-100=-19

xv=-(-9)/2.1=9/2

yv=-∆/4a=-(-19)/4.1=19/4

V=(9/2,19/4)