Question

б) 2x³-x(x²-6)-3(2x-1)-30=0
в) 12x(x-8)-4x(3x-5)=10-26x​

Answer 1

Ответ:

1) 2 x^3 - x (x ^ 2 - 6) - 3 (2 x - 1) - 30 = 0;

2 * x ^ 3 - x ^ 3 + 6 * x - 6 * x + 3 - 30 = 0;

x ^ 3 + 3 - 30= 0;

x ^ 3 - 27 = 0;

(x - 3) * (x ^ 2 + 3 * x + 9) = 0;

x - 3 = 0;

x = 3;

2) 12 x (x - 8) - 4 x (3 x - 5) = 10 - 26 x;

12 * x ^ 2 - 96 - 12 * x ^ 2 + 20 * x = 10 - 26 * x;

- 96 + 20 * x = 10 - 26 * x;

20 * x + 26 * x = 10 + 96;

46 * x = 106;

x = 106 / 46;

x = 53 / 23;