Question 1004568: Reduce the equation to standard form x^2+4y^2+6x+16y+21=0. Find the center, foci, ends of x and y axes.
Answer by MathLover1(20850)   (Show Source):
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 ...........complete square
for  part we have  and  => =>
for  part we have and  => =>
 => , ,  ,
the center:( , )
semimajor axis length: 
semiminor axis length: 
foci: ( ) and ( )
( , ) and ( , )
or ( , ) and ( ,)
vertices: ( , ) and ( , )
( , ) and ( , )
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