Find the center and the radius of the circle with the equation: x^2 - 2x + y^2 + 4y + 1 = 0
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Answer:
Hey there!
We have:
Let me know if this helps :)
The equation for working out the slope of a linear line is: , where x and y are the coordinate pairs.
So just pick two of the purple dots on the graph and fill in the equation.
I'll pick the dot that's (-4, 1) and (4, -7).
Now I just do , which is just
when simplified.