D. (x-14)(x+14)
a negative and a positive multiplied makes a negative outcome so -14•+14=-196. x•x is = to x^2
The answer is

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Remember to combine like terms.
Hop this helps. c:</span></span>
For this case we must simplify the following expression:

We convert the mixed number to an improper fraction:

So, by rewriting we have:


Answer:
