Answer:
1. -9x^4+6x^3+6x^2-16x+8 2. No
Explanation:
1. -9x^4+6x^3+6x^2-12x-4x+8= -9x^4+6x^3+6x^2-16x+8
2. No.
since -6x^4+9x^3+4x^2-6x-8x+12= -6x^4+9x^3+4x^2-14x+12
where -6x^4+9x^3+4x^2-14x+12 ≠ -9x^4+6x^3+6x^2-16x+8
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