Considere a equacao: 4x4-37x²+9=0

a- essa equacao eh biquadrada?

b- qual eh a equacao do 2 grau que se obtem ao substituir x² por y?

c- quais sao as raizes da equacao do item b?

d- quais sao as raizes da equacao 4x4-37x²+9=0?

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