+0  
 
0
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im not sure what to put in place of the one i have highlighted

 

https://prnt.sc/qd7z1v 

 Dec 19, 2019
 #1
avatar+22096 
+1

The highlighted box AND the one before it are incorrect....

    read the question....both of those boxes should be UNITS   ..... in other words, they should be numbers (not points or equations)....     Now try it!

 Dec 19, 2019
 #2
avatar+109563 
+1

-12(x - 5)  =  (y + 2)^2

 

Vertex  =  ( 5, -2)

 

Opens to the left

 

4p = -12

p = -3

 

The   focus  is   l p l  =   l -3 l  =   3 units from the vertex

 

The directrix  is   2 l p l  =  2 l - 3 l  =  2(3)   =   6 units from the focus

 

Focus  =  (5 + 3 , - 2)  =  (5 - 3, 2)   =   (2, -2)

 

The equation of the directrix  is    x  = (5 + 3)   ⇒     x  =   8

 

 

cool cool cool

 Dec 19, 2019

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