Rozwiąż równanie :
x²-6x=7
x²-6x-7=0
Δ=(-6)²-4*1*(-7)=36+28=64
√Δ=8
x₁=(-b-√Δ)/2a=(6-8)/2=-2/2=-1
x₂=(-b+√Δ)/2a=(6+8)/2=14/2=7
Odp. x=-1 lub x=7.
zadanie w załączniku.
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x²-6x=7
x²-6x-7=0
Δ=(-6)²-4*1*(-7)=36+28=64
√Δ=8
x₁=(-b-√Δ)/2a=(6-8)/2=-2/2=-1
x₂=(-b+√Δ)/2a=(6+8)/2=14/2=7
Odp. x=-1 lub x=7.
zadanie w załączniku.
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