(7x-2y)^2=49x^2-28xy+4y^2
x^2-y^2=13x + y = -5 => x = -y-5
(-y-5)^2 - y^2=13y^2+10y+25 - y^2=1310y+25=1310y=-12y=-1.2x = 1.2 - 5 = -3.8
Ответ: (-3.8;-1.2)
Ответ:
Объяснение:
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