Answer:

Step-by-step explanation:
<u>Exponents Properties</u>
We need to recall the following properties of exponents:


We are given the expression:

We need to express the following expression in terms of n.

It's necessary to modify the expression to use the given equivalence.
Recall
. Thus:

Applying the property:

Substituting the given expression:

Or, equivalently:

(9 x² + 8 x + 2) - ( 4 x² + 2 x -5 )
= 9 x² + 8 x + 2 - 4 x² - 2 x + 5
= 5 x² + 6 x + 7
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