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-x²-y²-8y-7=0
(-x-y)²-(8y-7)+(x-y)²-25=0
-8y-32=0
-8y-32=0 /+32
-8y=32 /:(-8)
y=³²/(₋₈)
y=-4
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x²+y²-25=0
x²=9 /:x
x²=9
x²=9 / ¹/₂
|x|=3 v x=-3
-----------------------------
a. dla x=3
y= -4
x=3
b. dla x=-3
y=-4
x=-3
INTEPRETACJA GRAFICZNA W ZAŁĄCZNIKU