My standard-form equation is (x+3)^2+(y+2)^2=4. Do I find the radius by doing the square root of four? I just wanted to check on this. Based on the example in my book, it seemed like this is the way to do this, but I wanted to make sure, because they didn't come right out and say that. Thanks for your help!!

Question

My standard-form equation is (x+3)^2+(y+2)^2=4.  Do I find the radius by doing the square root of four? I just wanted to check on this.  Based on the example in my book, it seemed like this is the way to do this, but I wanted to make sure, because they didn't come right out and say that. Thanks for your help!!

bobpursley · Answer

yes, in standard form, the radius is the square root of the right hand side.