Oieee
Bom,
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x⁴ - 13x² + 36 = 0
t² - 13t + 36 = 0
-(-13) ± √(-13)² - 4(36) / 2
13 ± √169 - 144 / 2
13 ± √25 / 2
13 ± 5 / 2
t = 9
t = 4
x = ± √t
S = { 3 ; -3 ; 2 ; -2 }
_
R)
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Qualquer dúvida me avise
A$$: MarcosPCV
