Question

4x4 - 5x2 + 9 = 0 alguem resolve isso por favor?

Answer 1

4x4 = 16 - 5x2 = 16 - 10 = 6 

Answer 2

Resposta:

$4x^4-5x^2+9=0\\\\4u^2-5u+9=0\\\\u=\frac{5}{8}+i\frac{\sqrt{119}}{8},\:u=\frac{5}{8}-i\frac{\sqrt{119}}{8}\\\\x=\frac{\sqrt{17}}{4}+\frac{\sqrt{7}}{4}i,\:x=-\frac{\sqrt{17}}{4}-\frac{\sqrt{7}}{4}i,\:x=-\frac{\sqrt{17}}{4}+\frac{\sqrt{7}}{4}i,\:x=\frac{\sqrt{17}}{4}-\frac{\sqrt{7}}{4}i$