1.suma dwoch liczb wynosi 3.znajdz te liczby ,wiedzac,ze ich iloczyn wynosi -1,75.
x+y=3
x*y=-1,75
x=3-y
(3-y)*y=-1,75
3y-y²=-1,75
-y²+3y+1,75=0
Δ=3²-4*(-1)*1,75
Δ=9+7
Δ=16
√Δ=4
y₁=(-3-4)/(2*(-1))
y₁=-7/-2
y₁=7/2
y₂=(-3+4)/(2*(-1))
y₂=1/-2
y₂=-1/2
x₁=3-7/2
x₁=6/2-7/2
x₁=-1/2
x₂=3-(-1/2)
x₂=6/2+1/2
x₂=7/2
Te liczby to 7/2 i -1/2.
tAK JAK TEEN DO GUURY MA DOBRZEE ;PP
więc daj mu najlepszą odp ;]]
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x+y=3
x*y=-1,75
x=3-y
(3-y)*y=-1,75
3y-y²=-1,75
-y²+3y+1,75=0
Δ=3²-4*(-1)*1,75
Δ=9+7
Δ=16
√Δ=4
y₁=(-3-4)/(2*(-1))
y₁=-7/-2
y₁=7/2
y₂=(-3+4)/(2*(-1))
y₂=1/-2
y₂=-1/2
x₁=3-7/2
x₁=6/2-7/2
x₁=-1/2
x₂=3-(-1/2)
x₂=6/2+1/2
x₂=7/2
Te liczby to 7/2 i -1/2.
tAK JAK TEEN DO GUURY MA DOBRZEE ;PP
więc daj mu najlepszą odp ;]]