Решите уравнение: х (х+9,4) (х-6,5) = 0 (х-21) (х+12,4) = 0 (х+1,2) (х+5) (х-10) = 0 (х+1) (х-2) = 0

Найдем корни.

1) х * (х + 9,4) * (х - 6,5) = 0;

{ x = 0;

x + 9.4 = 0;

x - 6.5 = 0;

{ x = 0;

x = - 9.4;

x = 6.5.

2) (х - 21) * (х + 12,4) = 0;

{ x - 21 = 0;

x + 12.4 = 0;

{ x = 21;

x = - 12.4.

3) (х + 1,2) * (х + 5) * (х - 10) = 0;

{ x + 1.2 = 0;

x + 5 = 0;

x - 10 = 0;

{ x = - 1.2;

x = - 5;

x = 10.

4) (х + 1) * (х - 2) = 0;

{ x + 1 = 0;

x - 2 = 0;

{ x = - 1;

x = 2.