Question

Rozwiąż równanie - banalne! delta itp.

Answer 1

2(x-1)/(x+2)=x/(x-1)  /*(x+2)(x-1)   , x≠-2 ∧, x≠1
2(x-1)(x-1)=x(x+2)
2(x²-2x+1)=x²+2x
2x²-4x+2-x²-2x=0
x²-6x+2=0
Δ=36-4*2=28
√Δ=2√7
x=(6-2√7)/2=3-√7  v  x=3+√7