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hammer [34]
3 years ago
14

How do you factor 9y^4- 1

Mathematics
1 answer:
cricket20 [7]3 years ago
7 0
Recognize the difference of 2 perfect squares

remember
a²-b²=(a+b)(a-b)


9y⁴=(3y²)²
1=1²

9y⁴-1=(3y²)²-(1)²=(3y²+1)(3y²-1)
if we wanted to force a factor again
(3y²+1)(y√3+1)(y√3-1)
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