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x²(x²-6x+8)=0 ⇔ x²=0 ∨ x²-6x+8=0
x=0
x²-6x+8=0
Δ=b²-4ac
Δ=(-6)²-4*1*8
Δ=36-32
Δ=4
√Δ=√4
√Δ=2
x1=(-b-√Δ)/2a
x1=(6-2)/2
x1=4/2
x1=2
x2=(-b+√Δ)/2a
x2=(6+2)/2
x2=8/2
x2=4
x=0 ; x=2 ; x=4 sa to pierwiastki rownania
Odp.: rownanie ma trzy rozwiazania.