Question

пжжжжжжжжжж lg(x+2)+lgx=1/2 lg9

Answer 1

1)х^2 - 4x -12 = 0,
2)x1  + x2 = 4,   x1*x2= -12  x1 = 6, x2 = -2.
х принадлежит (-2;6)