English: This simply means the constant term is non-zero right, because f of 0 is the constant term of any polynomial suppose it is not 0 1 is certainly in S, because constant of 1 is 1 which is not 0.
Kannada: ಪೊಲಿನೋಮಿಯಲ್(polynomial) ಅದು 0 ಅಲ್ಲ 1 ಎಂದು ಭಾವಿಸೋಣ 1 ಖಚಿತವಾಗಿ S ನಲ್ಲಿದೆ, ಏಕೆಂದರೆ ಕಾನ್ಸ್ಟಂಟ್(constant)(1) ಇದು 0 ಅಲ್ಲ. non-zero. So, f g is in S ok.