Question

4x2+6x=o

5x2+10x=0

x2+4x=7x

Answer 1

1º                     2º                          3º

4x+6x=0-2            5x+10x=0-2          x+4x-7x=-2

10x=-2                  15x=-2                  5´-7x=-2

x=-2/10                  x=-2/15                -2x=-2

                                                          x=-2/-2=2/2=1