# How do you write the equation of the ellipse #9x^2 + 4y^2 – 72x + 40y + 208 = 0#in standard form?

##### 1 Answer

Nov 15, 2016

The standard form of the ellipse is

#### Explanation:

Let' rewrite the equation step by step

Divide by

graph{9x^2-72x+4y^2+40y+208=0 [-7.69, 14.82, -11.84, -0.59]}