Ответ:
Объяснение:
x-y=7; => x=7+y
xy=8; =>(7+y)y=8; y^2+7y-8=0; D=49+4*8=81
y1=(-7+9)/2=1;
y2=(-7-9)/2=-8;
x1=7+1=8;
x2=7-8=-1;
M1(8;1); M2(-1;-8);
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Ответ:
Объяснение:
x-y=7; => x=7+y
xy=8; =>(7+y)y=8; y^2+7y-8=0; D=49+4*8=81
y1=(-7+9)/2=1;
y2=(-7-9)/2=-8;
x1=7+1=8;
x2=7-8=-1;
M1(8;1); M2(-1;-8);