I haven't worked in those for a while (I'm not sure I remember how to use them); but I'm fairly certain my teacher wants me to stick with x-y coordinates.
Homework Statement
Find the centroid of the shape formed by the equation y2=x3-x4, the x-axis, and the y-axis.
Homework Equations
A=∫f(x)dx
Mx=∫(1/2)[f(x)]2dx
My=∫x[f(x)]dx
The Attempt at a Solution
I'm stuck on the integral.
I attempted u-substitution and got du=(1/2)(x3-x4)-1/2dx; "parts,"...