Решите уравнения х2 -14х + 40 =0- 12m2 +m -6 =0- x2+ 6x -2 =0- 3×2 — 4x — 5 =0-

15.09.2017
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Решите уравнения срочно надо
х2 -14х + 40 =0;
  12m2 +m -6 =0;

 x2+ 6x -2 =0; 
 3×2 — 4x — 5 =0;

                                                                                           X2=

                                                                                          

                                                                                           X2=7-3=4

                                                                                           X1=

                                                                                           Нет

                                                                                           X1=
    корней

                                                                                           D1=4-15=-11

    • вот решение

                                                                                             X1=7+3=10

                                                                                           D=1-4*12*(-6)=1+288=289=17^2

    -40=49-40=9=3^2

                                                                                             X2=
                                                                                           

                                                                                           D1=9+2=11