Equation of circle

find an equation of the circle with indicated properties:
a. center at (-3,5), diameter 20.
b. center at origin and diameter 16.

Result

a = (Correct answer is: 1) Wrong answer
b = (Correct answer is: 1) Wrong answer

Step-by-step explanation:

(xx0)2+(yy0)2=r2 (x+3)2+(y5)=102 a=1
x2+y2=82 b=1



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I want the steps

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