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ThunderCats400
@ThunderCats400
December 2019
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Resolva as equações biquadradas, transformando-as em equação do 2° grau.
d) ₓ⁴+81ₓ²=0
e) 4ₓ⁴-37ₓ²+9=0
f) 16ₓ⁴-40ₓ²+9=0
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huio
4x4 – 10x2 + 9 = 0 d
) x4 + 3x2 – 4 = 0 e) 4x4 -37x2 +
9 = 0 f
) 16x4 – 40x2 +
9 = 0
...
d) x^4+3x^2-4=0 y=x^2 y^2+3y-4=0 \Delta=3^2-4\cdot1\cdot(-4) ... x^2=1 x=\pm1. S=\{-1,1\} e) 4x^4-37x^2+9=0
y=x^2 4y^2-37y+
9=0
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