Question

me ajudem por favor, é pra amanha ​
rápidoooooooo

Answer 1

Resposta:

a) y = - 4x² + 4x + 5

a= - 4/ b= 4/ c= 5

delta= b² - 4 × a × c

delta= 4² - 4 × - 4 × 5

delta= 16 + 80

delta= 96

xv

xv= - b/2a

xv= - 4/2 × - 4

xv= - 4/ - 8

yv

yv= - delta/4a

yv= - 96/4 × - 4

yv= - 96/ - 16

yv= 6

V= (xv, yv)

V= (- 4/ - 8, 6)

b) y = x² + 4x - 2

a= 1/ b= 4/ c= -2

delta= b² - 4ac

delta= 4² - 4 × 1 × - 2

delta= 16 + 8

delta= 24

xv= - b/2a

xv= - 4/2 × 1

xv= - 4/2

xv= - 2

yv= - delta/4a

yv= - 24/4 × 1

yv= - 24/4

yv= - 6

V= (- 2, - 6)

Answer 2

Resposta:

a)

$xv = \frac{ - b}{2a}$

$xv = \frac{ - 4}{2( - 4)} = \frac{ - 4 \div 4}{ - 8 \div 4} = \frac{ - 1}{ - 2} = \frac{1}{2}$

$yv = \frac{ - Delta}{4a} \\ \\ Delta = {b}^{2} - 4ac \\ Delta = {4}^{2} - 4( - 4)(5) \\ Delta = 16 + 80 \\ Delta = 96 \\ \\ yv = \frac{ - 96}{4( - 4)} = \frac{ - 96}{ - 16} = 6$

V(1/2,6)

b)

$xv = \frac{ - 4}{2(1)} = \frac{ - 4}{2} = - 2$

$Delta = {4}^{2} - 4(1)( - 2) \\ Delta = 16 + 8 \\ Delta = 24$

$yv = \frac{ - Delta}{4a} \\ \\ yv = \frac{ - 24}{4(1)} = \frac{ - 24}{4} = - 6$

V(- 2, - 6)

Bons Estudos!