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ghbdttnn
@ghbdttnn
June 2022
1
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Решите систему уравнений:
{ xy-x=4
2x+y=7
Ответ должен получиться (1;5); (2;3)
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mmb1
Verified answer
xy-x=4
2x+y=7
-----------------
y=7-2x
x(7-2x)-x=4
7x-2x^2-x=4
2x^2-6x+4=0
x^2-3x+2=0
x=2
y=3
x=1
y=5
3 votes
Thanks 8
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Answers & Comments
Verified answer
xy-x=42x+y=7
-----------------
y=7-2x
x(7-2x)-x=4
7x-2x^2-x=4
2x^2-6x+4=0
x^2-3x+2=0
x=2
y=3
x=1
y=5