Question

The centre of a circle is the point with coordinates (-2, 7)

The point A with coordinates (6, 10) lies on the circle.
Find an equation of the tangent to the circle at A.
Give your answer in the form ax+by+c=0 where a, b and c are integers

Please helpppp

Answer 1

could be

7x + 5y - 82 = 0

or

X= -by-c

~~~~~, a = 0

a

But I'm not sure