Question 5371: I have a problem solving this?
(3x-7)exponent 4 . (3x-7)exponent -4
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! Do you mean to multiply:  ?
If this is indeed the question, there are several ways to simplify it. Do you remember the rule  ? The rule in words says that when you multiply two variables together with the same base number, you put down the base number, and then you add the exponents.
In the case of , the base number is  , and the base number is the same, so put down the base number, and add the exponents: 4 + (-4). This gives you  , but any non-zero number raised to the zero power is 1.
So the final answer is 1.
Another approach is to eliminate the negative exponent by writing  as the fraction  .
Then what you have is  , which as you can probably see, everything divides out, and what is left is 1.
Gee, after all this I hope I answered the right question. If not, try again!!
R^2 at SCC
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