The height of the ladders as the Independent variable is the one that I change
The given expression is a perfect square trinomial.
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How to classify the given expression?</h3>
Here we have the expression:

Notice that we can rewrite it as:

Then we can see that inside the parenthesis we have a difference of squares, but it is squared, so if we define:

We will have:

Which is in fact, a perfect square trinomial.
If you want to learn more about perfect squares:
brainly.com/question/1538726
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Answer:
2
Step-by-step explanation:
The degree of a polynomial is its highest exponent value: in this case, thats just two!
The 3rd one cause at first its 1ft = 10ft and it was an 8 by 8 square and now its a 4 by 4 square meaning it was divided by 2 meaning you divide 10 by 2 getting 1ft = 5ft