You can put this solution on YOUR website! ok this one is a little tuff
because there isnt a number that will go into all of those you just look at the letters
18c^4-9c^2+7c
you would divide everything by c
your awnser would be
c(18c^3-9c+7)
if it is done a diffrent way tell me and i will figure it out 4 you its been a long time scince i have done this stuff