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Vanecca
@Vanecca
July 2022
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Система уравнений
а) 3x-2y=7;4x-3y=8
б)x^2+xy+y^2=13;2y+x=5
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INESSA80
X=(7+2y)/3 x=(7+2y)/3 x=(7+2y)/3 x=(7+2y)/3
(28+8у)/3-3у=8 28+8у=(8+3у)*3 28+8у=24+9у у=4
x=(7+2*4)/3 x=5
у=4 у=4
2 votes
Thanks 2
INESSA80
^-это какой знак?
RinViolin
^-это степень, в которую возводят основание.
Такое как "х во второй степени" и т.д.
INESSA80
ок
INESSA80
x2+xy+у2=13 (5-2y)2+(5-2y)y+y2=13 25-20у+4у2+5у-2у2+у2=13
2у+x=5 x=5-2y x=5-2y
3у2-15у+12=0
у2-5у+4=0
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Answers & Comments
(28+8у)/3-3у=8 28+8у=(8+3у)*3 28+8у=24+9у у=4
x=(7+2*4)/3 x=5
у=4 у=4
Такое как "х во второй степени" и т.д.
2у+x=5 x=5-2y x=5-2y
3у2-15у+12=0
у2-5у+4=0