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OpenStudy (anonymous):
With medal What is the directrix of the parabola given by the equation y = -5x2 + 60x - 176?
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OpenStudy (anonymous):
please help
OpenStudy (campbell_st):
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...?
OpenStudy (anonymous):
any way I got the answer: y = 3+19 /20 But thank you. I can gave you metal.
OpenStudy (campbell_st):
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...
OpenStudy (anonymous):
testing
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