Maple basic: transform the maple results

Question

I was running diff(abs(2*x + 5), x), maple gives me an answer of 2*abs(1, 2*x + 5)

I actually dont know what that means. But I know the answer is (4*x + 10)/abs(2*x + 5). How could I transform the answer from 2*abs(1, 2*x + 5) to (4*x + 10)/abs(2*x + 5)

Thanks for the help.

Answer 1

diff(abs(2*x + 5), x) assuming x::real;

                  /    5\
          2 signum|x + -|
                  \    2/

ans1 := normal(convert(%,abs));

                 2 x + 5
         ans1 := -------
                 |    5|
                 |x + -|
                 |    2| 

ans2 := (4*x + 10)/abs(2*x + 5);

                 4 x + 10 
         ans2 := ---------
                 |2 x + 5|

combine(normal(convert(ans1-ans2, signum)));

                 0

The meaning of abs(1,x) is described on the Help page for the abs command.