None.
5x3 is a pure number, not a length.
5*3 = 15 square metres.
15
The answer is 21
5.3
3x4 plus 5x3 plus x2 - 5 divided by x 2 =[(3x4) + (5x3) + (x2 - 5)]/x2 =(12 + 15 + x2 -5)/x2 =(27 - 5 + x2)/x2 =(22 + x2)/x2
5*3 = 15 square metres.
What is the additive inverse of the polynomial –9xy2 + 6x2y – 5x3?
15
15
An expression. It can be factored out slightly too: 2x6 + 5x3 - 7x4 = x3(2x3 - 7x + 5)
30
no (5x3)
The answer is 21
5.3
12
-5
103933.5