 hopelless2124 
                                                13.12.2021 22:36
                                                
                                                hopelless2124 
                                                13.12.2021 22:36
                                             kif1305 
                                                13.12.2021 22:37
                                                
                                                kif1305 
                                                13.12.2021 22:37
                                             Supernub123464 
                                                19.02.2021 10:13
                                                
                                                Supernub123464 
                                                19.02.2021 10:13
                                             milanakalinovskaya 
                                                19.02.2021 10:14
                                                
                                                milanakalinovskaya 
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                                             Master2111 
                                                19.02.2021 10:14
                                                
                                                Master2111 
                                                19.02.2021 10:14
                                             Vureshivatel 
                                                19.02.2021 10:16
                                                
                                                Vureshivatel 
                                                19.02.2021 10:16
                                             bratan9 
                                                13.05.2020 07:45
                                                
                                                bratan9 
                                                13.05.2020 07:45
                                             andrey440 
                                                13.05.2020 07:45
                                                
                                                andrey440 
                                                13.05.2020 07:45
                                            
=3(x²-y²)=3(x+y)(x-y)
=(x-Y)(x+y)+(x+y)=(x-y+1)(x+y)
2) 3(x+y)(x-y)
3) x^2+y(x-y)