+0  
 
0
108
1
avatar

Please show process.

 May 12, 2019
 #1
avatar+106535 
+1

y^2 + 4x - 8y - 4  = 0

 

y^2 - 8y  =   -4x + 4            complete the square on y

 

y^2 - 8y + 16  = -4x + 4 + 16

 

(y - 4)^2  = - 4x + 20

 

-4x + 20  = (y - 4)^2

 

-4( x - 5)  = (y - 4)^2     multiply both sides by (-1/4)

 

x -5  = (-1/4)(y - 4)^2     add 5 to both sides

 

x = (-1/4)(y - 4)^2 + 5

 

cool cool cool

 May 12, 2019

24 Online Users