SOLUTION: show how to solve 81/p-4=p-4 (i know answer is 13 or -5)

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Question 705836: show how to solve 81/p-4=p-4 (i know answer is 13 or -5)
Answer by unlockmath(1688) About Me  (Show Source):
You can put this solution on YOUR website!
Hello,
First multiply by (p-4) to get:
81=p^2-8p+16
Subtract 81:
0=p^2-8p-65
Factor:
(p-13)(p+5)=0
Solve for p:
p=13
p=-5
Make sense?
RJ
www.math-unlock.com