factorize y⁴- 81 ..plzz fast
Answers
Answered by
5
Step-by-step explanation:
y⁴ - 81
=> (y²)² - (3²)²
=> (y² + 3²)(y² - 3²)
=> (y² + 9)(y + 3)(y - 3)
Identity used is x² - y² = (x + y)(x - y)
Answered by
3
Answer:
inst Megha_tomar_19
Step-by-step explanation:
=(y²)² - (3²)²
=(y² + 3²) (y² - 3²)
=(y² + 9) (y+3) (y-3)
=x² - y²
=(x+y) (x-y).
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