Please note that I'm not 100% sure on this question!
Answer:
[tex]x^{2} + 22x + 120[/tex]
Step-by-step explanation:
The ball pit was originally 10 × 12 feet long, or a 120ft area.
We can express the areas of the side and bottom extensions as [tex]12x[/tex] and [tex]10x[/tex] respectively.
The corner adjacent to both extensions can be expressed as [tex]x^{2}[/tex].
We can put these numbers into a polynomial:
[tex]x^{2} + 12x + 10x + 120[/tex]
This polynomial can then be simplified.
[tex]x^{2} + 22x + 120[/tex]