(4 - 3х)² + (2 - 3х)(3х + 2) = 28;
16 - 24x + 9x^2 + 4 - 9x^2 = 28;
-24x + 9x^2 - 9x^2 = 28 - 16 - 4;
-24x = 8;
x = 8 : (-24);
x = -1/3.
(4 - 3х)² + (2 - 3х)(3х + 2) = 28;
16 - 24x + 9x^2 + 4 - 9x^2 = 28;
-24x + 9x^2 - 9x^2 = 28 - 16 - 4;
-24x = 8;
x = 8 : (-24);
x = -1/3.