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Sagot :
Answer:
- -9x⁹y⁵
Step-by-step explanation:
Simplifying:
- (-8x⁴y³)*(2x⁵y²) + 7x⁹y⁵ =
- -16x⁴⁺⁵y³⁺² + 7x⁹y⁵ =
- -16x⁹y⁵ + 7x⁹y⁵ =
- (-16 + 7)x⁹y⁵ =
- -9x⁹y⁵
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