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natuska2
@natuska2
July 2022
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Yakubik93
3x-y=1 ; xy=10
-y=-3x+1 ; xy =10
y=3x-1 ; x(3x-1)=10
x(3x-1)=10
3x2-x-10=0
D=1+120 =121, 2 корня
x1= 1+11/6= 2
x2= 1-11/6=10/6=5/3= 1 2/3
y1=3*2-1= 6-1= 5
y2=3*5/3-1=4
Ответ: (2;5) и (1 2/3; 4)
0 votes
Thanks 1
TalyanTuar
Y = 3x-1
X(3x - 1) = 10
Y = 3x-1
3x^2 - x - 10 = 0
D = 1 + 120 = 11^2
X1 = (1+11)/6 = 2
X2 = (1-11)/6 = -5/3
Y1 = 3*2-1 = 5
Y2 = 3*(-5/3) -1 = -6
0 votes
Thanks 1
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Answers & Comments
-y=-3x+1 ; xy =10
y=3x-1 ; x(3x-1)=10
x(3x-1)=10
3x2-x-10=0
D=1+120 =121, 2 корня
x1= 1+11/6= 2
x2= 1-11/6=10/6=5/3= 1 2/3
y1=3*2-1= 6-1= 5
y2=3*5/3-1=4
Ответ: (2;5) и (1 2/3; 4)
X(3x - 1) = 10
Y = 3x-1
3x^2 - x - 10 = 0
D = 1 + 120 = 11^2
X1 = (1+11)/6 = 2
X2 = (1-11)/6 = -5/3
Y1 = 3*2-1 = 5
Y2 = 3*(-5/3) -1 = -6