Question

Resolva equações biquadrada
$x4 - 11x {}^{2} + 18 = 0$
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Answer 1

Olá!!!!!

−11x2+4x+18=0

(−11)⋅x2+(4)⋅x+(18)=0

x=−(4)±(4)2−4⋅(−11)⋅(18)−−−−−−−−−−−−−−−−−−√2⋅(−11)

x=−4±16−(−792)−−−−−−−−−−−√−22

x=4±808−−−√22

x=4±(2)⋅202−−−√22

x=(2)⋅[(2)±202−−−√](2)⋅(11)

x1=2+202−−−√11

x2=2−202−−−√11

Espero ter te ajudado!!!