Объяснение:
Ху= - 2.
3х-у=5 y= - 5+3x
X(-5+3x)= - 2
-5x+3x^2+2=0
3x^2-5x+2=0
D=b^2-4ac=(-5)^2-4×3×2=25-24=1
X1;2=(-b±кореньD)/2a
X1=(5+1)/2×3=6/6=1
X2=(5-1)/6=4/6=2/3
y1= - 5+3×1= - 5+3= - 2
y2= - 5+3×(2/3)= - 5+2= - 3
Ответ (1;-2) и (2/3; - 3)
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Объяснение:
Ху= - 2.
3х-у=5 y= - 5+3x
X(-5+3x)= - 2
-5x+3x^2+2=0
3x^2-5x+2=0
D=b^2-4ac=(-5)^2-4×3×2=25-24=1
X1;2=(-b±кореньD)/2a
X1=(5+1)/2×3=6/6=1
X2=(5-1)/6=4/6=2/3
y1= - 5+3×1= - 5+3= - 2
y2= - 5+3×(2/3)= - 5+2= - 3
Ответ (1;-2) и (2/3; - 3)