Question

Resolve as seguintes equações biquadradas
17) X⁴_3x²+2=0?
18)x⁴_5x²+4=0?

Answer 1

17) X⁴_3x²+2=0 => b/c= -3/2= -1-2/-1×-2

(x² - 1). (x² - 2) = 0

(x²=1). (x²=2)

x=±1, x=±√2

18)x⁴_5x²+4=0 => b/c= -5/4= -1-4/-1×-4

(x² - 1). (x² -4) = 0

(x²=1). (x²=4)

x=±1, x=±2