3x + y=7
+
2x^2 - y =7
3x+2x^2=14
2x^2+3x-14=0
D=9-4*2*(-14)=121
x1= -3-11/4
x2= -3+11/4
x1=-3,5
x2=2
y=7-3x
y1= 7-3*(-3,5)=17,5
y2=7-3*2=1
Ответ: (-3,5;17,5) и (2;1)
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3x + y=7
+
2x^2 - y =7
3x+2x^2=14
2x^2+3x-14=0
D=9-4*2*(-14)=121
x1= -3-11/4
x2= -3+11/4
x1=-3,5
x2=2
y=7-3x
y1= 7-3*(-3,5)=17,5
y2=7-3*2=1
Ответ: (-3,5;17,5) и (2;1)