Oblicz miejsca zerowe (x1 i x2)
y=x^2-x-2
y=-x^2+4x+3
x²-x-2 = 0
a=1 b=-1 c=-2
Δ=1-(-8)=9
√Δ=√9=3
x₁=1-3/2=-1
x₂=1+3/2=2
x²+4x+3=0
a=1 b=4 c=3
Δ=16-12=4
√Δ=√4=2
x₁=-4-2/2=-3
x₂=-4+2/2=-1
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x²-x-2 = 0
a=1 b=-1 c=-2
Δ=1-(-8)=9
√Δ=√9=3
x₁=1-3/2=-1
x₂=1+3/2=2
x²+4x+3=0
a=1 b=4 c=3
Δ=16-12=4
√Δ=√4=2
x₁=-4-2/2=-3
x₂=-4+2/2=-1