Answer:
y4 - 13y3 - 6y
Explanation:
(4y4 - 8y3)−(5y3 + 6y + 3y4)
-4x4 − 8y3 − 5y3 − 6y − 3y4
4y⁴ - 8y³ - (5y³ + 6y + 3y⁴)
= 4y⁴ - 8y³ - 5y³ - 6y - 3y⁴
= (4y⁴ - 3y⁴) + (- 8y³ - 5y³) - 6y
= y⁴ - 13y³ - 6y
Answer: y⁴ - 13y³ - 6y
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