Question

Give the center and radius of the circle.

x2 + y2 = 25
(2.3) r=5
(0.0) r=5
(0,0) r=25
(3.2) r=25

Answer 1

x=√−y2+25 or x=−√−y2+25

Explanation:

x2+y2=25

Step 1: Add -y^2 to both sides.

1. x2+y2+−y2=25+−y2
2. x2=−y2+25

Step 2: Take square root.

• x=√−y2+25 or x=−√−y2+25

Answer:

x=√−y2+25 or x=−√−y2+25