Question

решите уравнение: x/x+2=2/x-1​

Answer 1

На фото!!!!!!!!!!!!!!!!!!!

Answer 2

Объяснение:

x/(x + 2)=2/(x - 1)

x * (x - 1) = 2 * (x + 2)

x² - x = 2x + 4

x² - x - 2x - 4 = 0

x² - 3x - 4 = 0

D = b² - 4ac = -3² - 4 * 1 * (-4) =

= 9 + 16 = 25

x1 = (-b + √D)/(2a) = (3 + √25)/2 =

= (3 + 5)/2 = 4

x2 = (-b - √D)/(2a) = (3 - √25)/2 =

= -2/2 = -1