simplify the polynomial in descending powers of x: 3x^2 - 9x^3 - 3x^3 - 8x^2 + x - 3 - 7x
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Answer:
- 12x³ - 5x² - 6x - 3
Step-by-step explanation:
3x²-9x³-3x³-8x²+x-3-7x
=(-9-3)x³+(3-8)x²+(1-7)x-3
= - 12x³ - 5x² - 6x - 3
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