None. 5x3 is a pure number, not a length.
What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3?
Oh, what a happy little question! Let's think about shapes that could have a perimeter of 15 and an area of 16. One shape that comes to mind is a rectangle with dimensions 4 by 4. Another possibility is a square with sides of length 4. These shapes show us that there can be different ways to create beautiful combinations of perimeter and area.
15
15
An expression. It can be factored out slightly too: 2x6 + 5x3 - 7x4 = x3(2x3 - 7x + 5)
30
5.3
The answer is 21
no (5x3)
-5
103933.5