What is 9x^2+36y^2+18x-360y+585=0 ?

The solution to 9x^2+36y^2+18x-360y+585=0 is Ellipse with (h,k)=(-1,5),a=6,b=3

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9x^2+36y^2+18x-360y+585=0

9 x^{2} + 36 y^{2} + 18 x - 360 y + 585 = 0

(h, k) = (- 1, 5), a = 6, b = 3

Solution steps

9 x^{2} + 36 y^{2} + 18 x - 360 y + 585 = 0

Rewrite

9 x^{2} + 36 y^{2} + 18 x - 360 y + 585 = 0

in the form of the standard ellipse equation

\frac{( x - ( - 1 ) ) ^{2}}{6 ^{2}} + \frac{( y - 5 ) ^{2}}{3 ^{2}} = 1

Therefore ellipse properties are:

(h, k) = (- 1, 5), a = 6, b = 3

a > b

therefore

a

is semi-major axis and

b

is semi-minor axis

Ellipse with center (h, k) = (- 1, 5), a = 6, b = 3

What is 9x^2+36y^2+18x-360y+585=0 ?
The solution to 9x^2+36y^2+18x-360y+585=0 is Ellipse with (h,k)=(-1,5),a=6,b=3