Question

With medal

What is the directrix of the parabola given by the equation y = -5x2 + 60x - 176?

Answer 1

please help

Answer 2

well start with this

\[y = -5(x^2 - 12x + ?) - 176 + (-5*?)\]

what is the value of ? is the terms in x form a perfect square...?

Answer 3

any way I got the answer: y = 3+19 /20
But thank you.
I can gave you metal.

Answer 4

well I think you have a slight problem in you're solution, the parabola is concave down with a vertex at (6, 4) then the directrix is above the vertex.... you have it below the vertex...

Answer 5

testing