Решите уравнения срочно надох2 -14х + 40 =0; 12m2 +m -6 =0; x2+ 6x -2 =0; 3x2 - 4x - 5...

Question

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

x2+ 6x -2 =0;
3x2 - 4x - 5 =0;

Answer 1

Вот решение
                                                                                       -40=49-40=9=3^2                                                                                       X1=7+3=10                                                                                       X2=7-3=4                                                                                       D=1-4*12*(-6)=1+288=289=17^2                                                                                       X1=                                                                                       X2=                                                                                                                                                                              D1=9+2=11                                                                                       X1=                                                                                         X2=                                                                                       D1=4-15=-11                                                                                       Нет корней