Question

por favor socorro 7x²= - 14x ajude-me.

Answer 1

7x²+14x=0

7x(x+2)=0

|       |              x+2=0

|                        x= -2

|                                          7x=0

                                              x=0/7

                                               x=0

S=(-2, 0)

Espero ter ajudado.

Answer 2

7x² = - 14x
7x² + 14x = 0

x ( 7x + 14) = 0
|         |___________> 7x + 14 = 0
|                                 7x = -14
|______> x = 0              x= - 14 / 7
                                    x = - 2

S = {0; -2}

Espero ter ajudado! ^^