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-x² -3x+2=2 ∨ x²+3x-2=2
-x² -3x=0 ∨ x²+3x-4=0
Δ=9 ∨ Δ=9+16=25
√Δ₁= 3 ∨ √Δ₂=5
x₁=0 x³=-3+5/2=1
x₂=3+3/-2=-3 x₄=-8/2=-4
Rozw: x∈{-4,-3,0,1}