Решите уравнения 1) 1,2(5-5х)=-6(х-1) 2) 3х^2=4x 3) 1,96-x^2=0

1) 1,2 * (5 - 5 * х) = -6 * (х - 1); 

Раскроем скобки.

1.2 * 5 * (1 - x) = -6 * (x - 1); 

6 * (1 - x) = -6 * (x - 1); 

1 - x = -(x - 1); 

1 - x = -x + 1; 

-x + x = 1 - 1; 

0 * x = 0; 

Нескончаемо много корней. 

2) 3 * х^2 = 4 * x; 

3 * x^2 - 4 * x = 0;

x * (3 * x - 4) = 0;

x = 0;

3 * x - 4 = 0;

x = 0;

3 * x = 4;

x = 0;

x = 4/3.

3) 1,96 - x^2 = 0; 

1.4^2 - x^2 = 0; 

(1.4 - x) * (1.4 + x) = 0; 

1.4 - x = 0; 

1.4 + x = 0; 

x = 1.4; 

x = -1.4.