Question

(x - 1)2 + (y + 3)2 = 73 What is the radius ?

Answer 1

Answer: 73 - the radius

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Answer 2

Answer:

radius = $\sqrt{73}$

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

(x - 1)² + (y + 3)² = 73 ← is in standard form

with r² = 73 ( take the square root of both sides )

r = $\sqrt{73}$