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CheGuevara23
@CheGuevara23
July 2022
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Помогите решить систему уравнений, пожалуйста С:
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hraky
3x+y=12
X^2+y^2-2xy=4
Y=12-3x
X^2+(12-3x)^2-2x(12-3x)-4=0
X^2+144-72x+9x^2-24x+6x^2-4=0
16x^2-96x+140=0
4x^2-24x+35=0
D=576-560=4^2
X1=(24-4)/8=2,5
X2=(24+4)/8=3,5
Y1=12-7,5=4,5
Y2=12-10,5=1,5
Ответ: (2,5;4,5) и (3,5;1,5)
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Support001
Решение в приложении.
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Answers & Comments
X^2+y^2-2xy=4
Y=12-3x
X^2+(12-3x)^2-2x(12-3x)-4=0
X^2+144-72x+9x^2-24x+6x^2-4=0
16x^2-96x+140=0
4x^2-24x+35=0
D=576-560=4^2
X1=(24-4)/8=2,5
X2=(24+4)/8=3,5
Y1=12-7,5=4,5
Y2=12-10,5=1,5
Ответ: (2,5;4,5) и (3,5;1,5)