PLEASE HELP/kinda easy maths but I don’t get it/I’ll give brainiest award thingy

The product of the dimension must be 16.

In the first line, you have 1*1*16=16.

In the second line, you have 1*2*8=16.

In the third line, you start with 1 again. So, you need two more numbers that give 16 when multiplied, which are not 2 and 8. You don't have many choices.. :)

Similarly, in the last line, you start with 2. This means that the two missing numbers must give 8 when multiplied, and they can't be 1 and 8 (already used in the second line). Again, there are not many options.

Try to work this out on your own!

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0