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Amahaslo123
@Amahaslo123
July 2022
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Решите систему уравнений СРОЧНО!!!!!!!!!
2x+y=7
4x^2-y^2=7
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Answers & Comments
Dmitry1986
4x²-
(7-2x)²=7
4x²-(49-28x+4x²)=7
4x²
-49+28x
-4x²
=7
28x=7+49
28x=56
x=56:28
x=2
2x+y=7
2*2+y=7
4+y=7
y=7-4
y=3
Ответ: x=2, y=3
4 votes
Thanks 5
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Answers & Comments
4x²-(7-2x)²=7
4x²-(49-28x+4x²)=7
4x²-49+28x-4x²=7
28x=7+49
28x=56
x=56:28
x=2
2x+y=7
2*2+y=7
4+y=7
y=7-4
y=3
Ответ: x=2, y=3