Question

Calcuçe a vertice da parabola y= 4x²-16x+7

Answer 1

Vértice = -Δ÷4a
Δ= b²- 4×a×c
Δ= -16²-4×4×7
Δ=256-112
Δ= 144
-144÷16
Vértice y= 9

Answer 2

Xv= 
Yv=ax²+bx+c

a)x²-6x+5
Xv= ⇔Xv=  ⇔Xv=3
Yv=3²-6(3)+5 ⇔ Yv=9-6+5 ⇔ Yv=8
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b- y=x²+2x-2 
Xv= ⇔ Xv= ⇔ Xv= -1
Yv= (-1)²+2(-1)-2 ⇔ Yv= 1-2-2 ⇔ Yv= -3
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c-y=x² -4x 
Xv=  ⇔ Xv=  ⇔ Xv= 2
Yv= 2²-4.2 ⇔ Yv= 4-8 ⇔ Yv= -4
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e- y=4x²- 16 x + 7 
Xv=  ⇔ Xv=  ⇔ Xv= 2
Yv= 4.2² -16.2+7 ⇔ Yv= 4.4-32+7 ⇔ Yv= 16-32+7 ⇔ Yv= -9