SOLUTION: What is the equation of a circle with center(1,-3) and tangent to the line x=3?I think the answer is (x-1)+(y+3)=4 BUT I am not confident, can someone please help me :)

Question 139718: What is the equation of a circle with center(1,-3) and tangent to the line x=3?I think the answer is (x-1)+(y+3)=4 BUT I am not confident, can someone please help me :)
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Very close. You have the radius (2) and the center (1,-3) correct, but you forgot one rather important part of the equation of a circle.

A circle with radius r and center at (h,k) is

So you need to add the exponents to each of the binomials:

Not: , but
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