Answer:

Step-by-step explanation:
If that is a square, then all sides are the same. Therefore, it's a
by
shape. We'll use Pythagorean Theorem to find the diagonal.

Since it's not a fraction, there is no denominator to rationalize. Let me know if you have any other questions!
Its 36 because 4×9=36 and 12×3 is 36. hope this helps.
I-1 is the polynomials because I is the linear term and 1 is the constant