Question

simplifique x²-3x/2x+4 . x+2/x : x²-9/4x

Answer 1

[(x²-3x.x) / (2x+4).x)] : (x+3).(x-3) / 4x = 
[(x²-3x²) / (2x²+4x)] . [4x / (x+3).(x-3)] = 
[x(x-3) / 2x(x+2)] . [4x / (x+3).(x-3)] = 
[x(x-3).4x] / [2x(x+2).(x+3).(x-3)] =
[x.2] / (x+2).(x+3) = 
2x / (x+2).(x+3)