Question

Х^2 + 4х^2/(х+2)^2 = 5

Answer 1

$\frac{x^2+4x^2}{(x+2)^2}=5 \\ 5x^2=5(x+2)^2 \\ 5x^2=5(x^2+4x+4) \\ 5x^2=5x^2+20x+20 \\ 20x=-20 \\ x=-1$