oose equation for x, find all solutions in real numbers
x^4-13*x^3+41*x^2+13*x-42 = 0
place the answers in increasing order
____≤____≤___≤___
the roots i fined x= -1,1,5,7 but they want the answer in real numbers =S?
Petrus,
"Find all solutions in real numbers" means you are to find all the solutions which are real (like 6), as opposed to complex (like 2+i).
So assuming you have found all the solutions (I haven't checked your work), you are done. 6 is 6, you don't have to write it any other way.