how to solve for y in the equation x^2+Y^2=4

I need to solve the equation for y and then graph. Any step by step help would be great. I cannot remember how to remove the ^2 from the y.
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1 Answer

It is easier to graph as it. This is a circle centered at (0,0)

that goes through (0,2), (2,0), (0,-2), (-2,0)  radius =2

to solve y^2 =4-x^2

y= sqrt(4-x^2)

and y= - sqrt(4-x^2)
by Level 5 User (12.9k points)

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