Question

Find the standard form of the equation of the parabola with a focus at (-4, 0) and a directrix at x = 4

Answer 1

Opening to the left

Answer 2

I dont know the rest

Answer 3

a is 1/4p where the focus is (h, k + p)

Answer 4

So 1/4p where focus is 0 , 0 + 0 ?

Answer 5

(1/(4*0))(x-0)^2 + 0 ?

Answer 6

Please try to apply the definition of a parabola, namely:

so we can write this:
\[\sqrt {{{\left( {{x_0} - 4} \right)}^2} + {{\left( {{y_0} - \left( { - 4} \right)} \right)}^2}} = \left| {{x_0} - 4} \right|\]