The equation of a circle is #x^2+y^2+8x−14y+56=0# . What is the radius of the circle?
1 Answer
Jan 4, 2018
r = 3
Explanation:
Equation General:
Re-arranging:
Making squares by analogy (method)
1): divide each no square variable coefficient
2): make square each divided coefficient
3) Substitute previous coefficients in general equation: