Question

корень x2степени - 5x+15=3​

Answer 1

Ответ:

$x = 2 \\ x = 3$

Пошаговое объяснение:

$\sqrt{ {x}^{2} - 5x + 15} = 3 \\ {x}^{2} - 5x + 15 = 9 \\ {x}^{2} - 5x + 15 - 9 = 0 \\ {x}^{2} - 2x - 3x + 6 = 0 \\ x(x - 2) - 3(x - 2) = 0 \\ (x - 2)(x - 3) = 0 \\ \\ x - 2 = 0 \\ x = 2 \\ \\ x - 3 = 0 \\ x = 3$