Объяснение:
{x²-y²=1
{x+y=8 x=8-y
(8-y)²-y²=1
64-16y+y²-y²=1
64-16y=1
-16y=1-64
-16y= -63
y=63/16= 3 15/16
x= 8-3 15/16=7 16/16-3 15/16=4 1/16
ответ: (4 1/16 ; 3 15/16)
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Объяснение:
{x²-y²=1
{x+y=8 x=8-y
(8-y)²-y²=1
64-16y+y²-y²=1
64-16y=1
-16y=1-64
-16y= -63
y=63/16= 3 15/16
x= 8-3 15/16=7 16/16-3 15/16=4 1/16
ответ: (4 1/16 ; 3 15/16)