-13x -3x² was ist dao´von die lösung ?

Guten Abend Anonymous,

1.)   -13x -3x² = -x*(13+3x)

2.)  -13x -3x² = 0       |  * (-1)

         13x + 3x² = 0

          x *( 13+3x ) = 0           =>      x1 = 0       ;      13+3x =0     

                                                                            =>  3x = -13   =>   x = $${\mathtt{\,-\,}}{\frac{{\mathtt{13}}}{{\mathtt{3}}}}$$

Gruß radix !