# Calculus

posted by
**Jinal**
.

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

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