2х²-px=-4, x₁-x₂=-1,
2x²-px+4=0,
x²-px/2+2=0,
x₁+x₂=p/2,
x₁·x₂=2,
x₁-x₂=-1,
x₁=x₂-1,
(x₂-1)·x₂=2,
x₂²-x₂-2=0,
x₂₁=-1, x₂₂=2,
x₁₁=-2, x₁₂=1,
p=2(x₁+x₂),
p₁=-6,
p₂=6.
2х²-px=-4, x₁-x₂=-1,
2x²-px+4=0,
x²-px/2+2=0,
x₁+x₂=p/2,
x₁·x₂=2,
x₁-x₂=-1,
x₁·x₂=2,
x₁=x₂-1,
(x₂-1)·x₂=2,
x₂²-x₂-2=0,
x₂₁=-1, x₂₂=2,
x₁₁=-2, x₁₂=1,
p=2(x₁+x₂),
p₁=-6,
p₂=6.