whats the greatest common factor of ..
1. -60r^2s^2t^2 and 45r^3t^3
2. 32m^2n^3 and 18m^2n^2 and 56m^3n^2
1. -60r^2s^2t^2 and 45r^3t^3
2. 32m^2n^3 and 18m^2n^2 and 56m^3n^2