Question

Решите уравнения х^4-6х^2+8=0

Answer 1

х^4-6х^2+8=0

x^2=t

t^2-6t+8=0

D=(-6)^2-4*1*8=36-32=4=2^2

t=(6+-2)/2

t1=4

t2=2

x^2=4

x^2=2

x1=2

x2=-2

x3=√2

x4=-√2