Answer:
A, 1 UNIT
i don't have an explanation.
(-9x -1) x (4x+1)
use foil method
-9x * 4x - 9x - 4x - 1
collect like terms by multiplying the -9x and the 4x together, then you add together both -9x and -4x. Then you have your answer below
-36x^2 - 13x - 1
Polynomial of degree 2 are those polynomials with highest power of two, from our choices, the polynomials of degree two are:
10x^2-x^(1/2)
6x^2-6x+5
The rest of the choices are polynomials of degree 3.
8x-11 I believe
combine like terms
5+(-7)-9