(9x^4+0x^3+8x^2+17x-20)÷(-3x-4)

Answer 1

In google type:
polynomials divided solver

When you see list of results click on:

calc101com/webMathematica/longdivide.jsp

When page be open in rectacangle Divide type:

9x^4+0x^3+8x^2+17x-20

In rectacangle by type:

-3x-4

Then click option DO IT

You will see solution.

Answer 2

Final answer is:

-3x^3+4x^2-8x+5