Question

Equação Biquadrada:
7x⁴+812x²+1120=0

Answer 1

Resposta:

$7x^{4}+812x^{2}+1120=0\\ \\7x^{4}=7(x^{2})^{2}\\ \\atribua~uma~incognita~para~substituir~x^{2} \\ \\ x^{2}=y\\ \\7(x^{2})^{2}+812x^{2}+1120=0\\ \\7y^{2}+812y+1120=0\\ \\Equacao~de~Bhaskara:\\ \\\frac{-b+-\sqrt{delta}}{2a}\\ \\delta=b^{2}-4.a.c\\ \\delta=\sqrt{7^{2}-4.7.1120}\\ \\delta=\sqrt{49-31360}\\ \\delta=-31311\\ \\Delta~negativo: NAO~EXISTE~RAIZ~REAL~PARA~A~EQUACAO$