Question

3. Решите уравнение x/(x + 2) = 2/(x - 1)​

Answer 1

х/(х+2)=2/(х-1)

х×(х-1)=2(х+2)

х×(х-1)-2(х+2)=0

х²-х-2х-4=0

х²-3х-4=0

х²+х-4х-4=0

х×(х+1)-4(х+1)=0

х+1=0

х-4=0

х=-1

х=4

х¹=-1 х²=4