Answer:
1. Quintic
2. -8x^5 + 10x^4
Explanation:
1.
Quintic: Has a power of 5 for ex. -6x^(5) + 4x^3 + 3x^2 + 11
Cubic: x^(3) + 12x + 9
Quartic: x^(4) + 5x^3 - 6
Quadratic: x^(2) - x + 5
2.
-2x^2(-5x^2 + 4x^3)
(10x^4 - 8x^5) or (-8x^5 + 10x^4)
When multiplying numbers with exponents, multiply the numbers but add together the exponents.
I hope this helps!