Question 27476
you are correct... lets look at it written out fully:


{{{3(5-x)^4+2(5-x)^3-(5-x)^2}}} means
3(5-x)(5-x)(5-x)(5-x) + 2(5-x)(5-x)(5-x) - (5-x)(5-x)


so, you can see that (5-x)(5-x) is common to all 3 terms. Taking that out, leaves:
(5-x)(5-x)[ 3(5-x)(5-x) + 2(5-x) - 1]


so, writing this in neater format is
{{{(5-x)^2(3(5-x)^2 + 2(5-x) - 1)}}}


Hope this helps.


jon.