Question

Ver a soma da conta (3+x)2

Answer 1

olá!

 questão de produtos notáveis:   ( 3 + x )²

    

                                                    ( 3 + x ) . ( 3 + x )

                                                  

                                                    9 + 3x + 3x + x²

 

                                                    9 + 6x + x² 

 

                                                   x² + 6x + 9