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a^2-b^2=-3
-a-b=-1
a^2-b^2=-3
-a=-1+b/*(-1)
a^2-b^2=-3
a=1-b
(-1+b)^2-b^2=-3
a=1-b
1+b^2-b^2=-3
a=1-b
b^2-b^2=-4
a=1-b
b=-4
a=1-4
b=-4
a=-3
b=-4
nwm czy dobrze