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

Решите уравнения срочно надо х2 -14х + 40 =0;   12m2 +m -6 =0;  x2+ 6x -2 =0;   3x2 - 4x - 5 =0;
Гость
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Гость
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
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