AM-2333

Equation of a circle (general form)

A Math · Secondary 4 · Medium · Equation of a circle (general form)

A circle has equation

x^2 + y^2 - 4x + 10y = 7

.

Find the centre and radius of the circle.

Centre $(2,-5)$ , radius $6$
Centre $(-2,5)$ , radius $6$
Centre $(2,-5)$ , radius $\sqrt{7}$
Centre $(-2,5)$ , radius $\sqrt{36}$

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