Question

найти корни уравнения: x-5= -4/x

Answer 1

x( x - 5) = - 4
x² - 5x + 4 = 0
D = b² - 4ac = 25 - 4 × 4 = 25 - 16 = 9 = 3²
x1 = ( 5 + 3) / 2 = 4
x2 = ( 5 - 3) / 2 = 1
Ответ: x1 = 4, x2 = 1.