What is the additive inverse of the polynomial negative 9 x y squared plus 6 x squared y minus 5 x cubed ?

The additive inverse is the polynomial that sums with the original to make zero, so change the sign of every term. The inverse of −9xy² + 6x²y − 5x³ is 9xy² − 6x²y + 5x³. This matches choice A.

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