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решите систему уравнений методом подстановки (x-y)^2-x+y=0, x^2*y^2-xy-2=0
Ответы 1
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Не совсем поняла о какой подстановке здесь идёт речь, но я бы решала как на прикреплённой ниже фотографии.
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Автор:
meadows - 5 лет назад
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1. Hundreds of burglars ___________ (arrest) over the past six months.
2. Yesterday five young men ___________ (arrest) with connection with one of the
attacks.
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(1)Mount Everest and K2 ____________ to be the two highest mountains in the world,
but they are very different.
(a)believe
(b)is believed
(c)believed
(d)are believed
(2)Everest ____________ for the first time in 1953.
(a)is climbed
(b)climbed
(c)was climbed
(d)has been climbed
(3)Since 1953 thousands of people ____________ on Everest.
(a)have stood
(b)stood
(c)are standing
(d)have been standing
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____________ to the top by guides.
(a)take
(b)are taken
(c)have taken
(d)have been taken
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(d)hasn’t been climbed
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(a)try
(b)have tried
(c)are tried
(d)are trying
(10)Some of the worst Himalayan accidents in the last twenty years ____________ on K2,
and many lives have been lost.
(a)happen
(b)have happened
(c)will happen
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