faithw6897 faithw6897
  • 08-01-2020
  • Mathematics
contestada

which expression represents the equation of the parabola with focus of (-3,3) and directrix y

Respuesta :

afsahsaleem afsahsaleem
  • 08-01-2020

Answer:

Equation of the parabola with focus of (-3,3) and directrix y

[tex](x+3)^{2}=4a(y+a-3)[/tex]

Step-by-step explanation:

As directix is not give so writing it in form of a.

Standard equation for parabola with directix is y = k - a and focus (h,k+a)

[tex](x-h)^{2}=4a(y-k)---(1)[/tex]

Given that focus is (-3, 3)

(-3, 3) = (h, k +a)

by comparison

h= -3

k+a = 3

a = 3 - a

Substituting this value in (1)

[tex](x-(-3))^{2}=4a(y-(3-a))\\(x+3)^{2}=4a(y+a-3)\\[/tex]

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