Question

Y=-x elevado a2+9x-14

Answer 1

Resposta:

y=-x²+9x-14

a=-1

b=9

c=-14

∆=b²-4.a.c

∆=(9)²-4.(-1).(-14)

∆=81 -56

∆=25

x'=[-(+9)+√25]/2.(-1)

x'=[-9 +5]/-2

x'= -4/-2

x'=2

x"=[-(+9)-√25]/2.(-1)

x"=[-9 -5]/-2

x"= -14/-2

x"= 7

S={( 2 ; 7)}

xv=-b/2a

xv=-9/2.(-1)

xv=-9/-2

xv=9/2

yv=-∆/4a

yv=-25/4.(-1)

yv=-25/-4

yv=25/4

V={( 9/2 ; 25/4)}

Explicação passo a passo: