Answer :
Final answer:
The expression -4x³-12x³+9x² simplifies to -16x³ +9x². So, the equivalent expression from the given options is (d) -16x³ +9x².
Explanation:
The given expression is -4x³-12x³+9x². We can combine like terms to simplify this expression. The like terms in the expression are -4x³ and -12x³.
Combining -4x³ and -12x³ gives us -16x³. The +9x² term doesn't have any like terms, so it remains as it is.
So, the simplified expression is -16x³ +9x². Comparing this with the provided options, the correct answer is (d) -16x³ +9x².
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