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x⁴ + 8x² + 10 = -6
wprowadzam x² = t ( t > 0)
t² + 8t + 16 = 0
Δ = 64 - 64 = 0
t = -b/2a
t = -4
brak rozwiązania
x4+8x2+10+6=0
x2(x2+8)+16=0
(x2+8)(x2+16)=0