can sumeone plz help me find the derivative of (2x^2 - 12x -2) / ((x^2 + x - 2) ^ 2)

Question

thx a lot

Use the following rule:

derivative of u(x)/v(x) =
[v du/dx - u dv/dx]/ v^2

In your case, du/dx = 4x - 12;
dv/dx = 2 (x^2 + x -2)*(2x +1)
v^2 = (x^2 + x - 2)^4
Put it all together