You were already shown how to type in the polynomial division format in the earlier posting.
Polynomial Division works the same way as does regular long division.
Account for ALL degree terms, which is why 0*x^3 is shown here.
You start the division this way:
How many times is 2x^2 contained in 8x^4?
4x^2 times.
This first partial quotient and resulting multiplication is shown.
The subtraction result is also included.
4x^2
______________________________________________
|
2x^2-x+2 | 8x^4 0x^3 6x^2 -3x 1
| 8x^4 -4x^3 8x^2
-------------------------
0 4x^3 -2x^2
Now, you continue from there!