Question

2x^2 + 2y^2 + 2x - 4y = -1
find the standard form of the circle

Answer 1

Do you know how to use completing the square? Because this is what you have to do in this case.

Answer 2

Oh and divide by two first of course. makes it a bit easier.

Answer 3

he's right, should be no problem solving now

Answer 4

\[ k: f(x,y)=(x+\frac{1}{2})^2+(y-1)^2= \frac{3}{4} \]
possible that I have done a careless mistake somewhere, but this is what I get.

Answer 5

thanks