Question

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Answer 1

= -5x³ + 5y³

Explanation:

4y³ - 5x³ - 1 - 4y³ - 6 + 7 + 5y³

= -5x³ + (4y³ - 4y³ + 5y³) + (- 1 - 6 + 7)

= -5x³ + (0 + 5y³) + (- 7 + 7)

= -5x³ + 5y³

Answer 2

Answer: -5x^3 + 5y^3

Step-by-step explanation: The other parts cancelled out