Question

33 5. [4]Решите уравнение. (x+3)² - (2x - 5)(5 + 2x)-3(5-x²) = 1 ​

Answer 1

Ответ:

(x+3)² - 10x + 10 - 15 + 3x² - 15 + 5x = 1

4x² + 8x - 5 = 1

4x² + 8x - 6 = 0

(2x - 3)(2x + 2) = 0

2x - 3 = 0

2x = 3

x = 3/2