Question

MMC de 18x³y,21x²y²,45x⁴y

Answer 1

               MMC (18x³y,21x²y²,45x⁴y ) = 630x⁴y²

          18x³y   = 2 . 3² x³ y         
          21x²y²  = 3 . 7  x² y²        
          45x⁴y   = 3². 5  x⁴ y                                       

        mmc(18,21,45) = 2 . 3² .5 . 7 = 630                                      
        mmc(x²,x³,x⁴)  =  x⁴                                        
        mmc(y,y²)  =  y²