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safaka
@safaka
September 2021
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Пожалуйста решите,только б,прошууууу.
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sshum111
X²-2x=y замена ⇒ у+у-12=0⇒ d=49 y1=3 y2=-4
1 ) x²-2x=3⇒ x²-2x-3=0⇒ d=16 x1=3 x2=-1
2 ) x²-2x=-4⇒x²-2x+4=0⇒ d<0 нет решений
значит х1=3 х2=-1
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Answers & Comments
1 ) x²-2x=3⇒ x²-2x-3=0⇒ d=16 x1=3 x2=-1
2 ) x²-2x=-4⇒x²-2x+4=0⇒ d<0 нет решений
значит х1=3 х2=-1