Answer:
10x^5 - 5x^4 - x^3 - 4x^2 - 9x + 9
Explanation:
(10x^4+5x^3+4x^2-9) × (x-1)
10^5 - 10x^4 + 5x^4 -5x^3 +4x^3 - 4x^2 -9x + 9
Collect Like terms
10^5 - 10x^4 + 5x^4 -5x^3 +4x^3 - 4x^2 -9x + 9
10^5 - 5x^4 -x^3 - 4x^2 -9x + 9
Final Answer
10x^5 - 5x^4 - x^3 - 4x^2 - 9x + 9