Q20. The radius of a circle x² + y² +2gx+2fy+c=0 touching x-axis is:Mathematics — Conic Sections — Question 20 of 272A. √g2-cB. √f2-cC. √g2+-f2-cD. fPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →