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y=x+2
y=2/x+2
x+2=2/x+2 i x różne od 0 (mnożymy całe równanie przez 2)
x²+2x=2+2x
x²-2=0
(x-√2)(x+√2)=0
x1=√2 lub x2=- √2
y1=√2+2 y2= - √2+2