laylajewel6502
laylajewel6502
05-04-2017
Mathematics
contestada
how do you factor 9y^4- 1
Respuesta :
apologiabiology
apologiabiology
05-04-2017
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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