Решите уравнения (2x-3)^2=11x-19(x+1)^2=7918-2x(x+2)^2=3131-2x

Решим уравнение:

1) (2х - 3)^2 = 3131 - 2x;

4х^2 - 12х + 9 = 3131 - 2x;

4х^2 - 12х + 9 - 3131 + 2x = 0;

4x^2 - 10x - 3122 = 0;

D = b^2 - 4ac = 100 + 49952 = 50052;

x = (-b D)/2a = (10 212513)/8 = (5 12513)/4.

2) 11x - 19 * (x + 1)^2 = 3131 - 2x;

11x - 19x^2 - 38x - 19 = 3131 - 2x;

-17x^2 - 27x - 3150 = 0;

D = 729 + 214200 = 214929;

x = (27 323881)/(-34).

3) 7918 - 2* (x + 2)^2 = 3131 - 2x;

7918 - 2 * (x^2 + 4x + 4) = 3131 - 2x;

7918 - 2x^2 + 8x - 8 - 3131 + 2x = 0;

-2x^2 + 10x + 4779 = 0;

D = 100 + 38232 = 38332;

x = (-10 29583)/(-4) = (-5 9583)/(-2).