General Form to Standard Form, With Help
View the Lesson | MATHguide homepage Updated April 14th, 2017


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    81x2 + 9y2 - 486x + 36y + 36 = 0 is the general form of an ellipse. Write the equation of this conic section in standard form by filling in the appropriate values for each open response.

Step 1:81x2 - 486x + 9y2 + 36y =  
Step 2: 81(x2 - 6x) + 9(y2 + y) =  
Step 3: 81(x2 - 6x + ) + 9(y2 + y + ) =  
+ 81()
+ 9()
 
Step 4: 81(x - )2 + 9(y + )2 =  
Step 5:
(x - )2  (y + )2
+
 
=