All,
I have the function
(%i1) y(x):=(x^2-1)^10*(x^2+1)^15;
(%o1) y(x):=(x^2-1)^10*(x^2+1)^15
(%i2) diff(y(x),x);
(%o2) 20*x*(x^2-1)^9*(x^2+1)^15+30*x*(x^2-1)^10*(x^2+1)^14
manually this simplifies to
10*x*(5*x^2-1)*(x^2-1)^9*(x^2+1)^14
however factor(%) yields
(%i3) factor(%);
(%o3) 10*(x-1)^9*x*(x+1)^9*(x^2+1)^14*(5*x^2-1)
What am I not seeing or doing incorrectly?
Thanks
Ron