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zaetsoyulya2000
@zaetsoyulya2000
July 2022
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Решить систему уравнений х-y=2 x+yx=20
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Yumma
У=х-2, х+х (х-2) =20
у=х-2, х^2-2х+х=20
у=х-2, х^2-х-20=0, Д=1+4*20=81 =9*9, х= (1+-9) /2
Х= -4 или х=5
у= -4-2=-6 или у=5-2=3
Ответ: (-4,-6), (5, 3)
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Answers & Comments
у=х-2, х^2-2х+х=20
у=х-2, х^2-х-20=0, Д=1+4*20=81 =9*9, х= (1+-9) /2
Х= -4 или х=5
у= -4-2=-6 или у=5-2=3
Ответ: (-4,-6), (5, 3)