# Please help me understand this problem

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• November 23rd 2013, 11:46 AM
thatsmessedup
Please help me understand this problem
I can quite grasp what is going on here. Can your bright minds please shine a little light my way. I do understand the first 2 but I don't know how they came about with the last two.
• November 23rd 2013, 12:01 PM
HallsofIvy
Re: Please help me understand this problem
You appear to be saying that you know that [tex](x^a)^b= x^{ab}[tex] so that [tex](x^{p+1})^2(x^{p-1})^2= (x^{2(p+1)})(x^{2(p-1)})[tex].

Do not know that $x^{a}x^{b}= x^{a+ b}$? $x^{2(p-1)+ 2(p+1)}= x^{2p- 2+ 2p+ 2}$.
• November 23rd 2013, 12:27 PM
thatsmessedup
Re: Please help me understand this problem
^^thanks! This make sense now.