Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
In each of the following Exercises 6 to 9, find the centre and radius of the circles. 7.
x
2
+
y
2
−
4
x
−
8
y
−
45
=
0
x^{2}+y^{2}-4 x-8 y-45=0
x
2
+
y
2
−
4
x
−
8
y
−
45
=
0
Browse the problem library