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w(-2√2)=4a+2b-4=4
64a+8b=80
4a+2b=8 /*4
64a+8b=80
16a+8b=32 odejmujemy rowmanie stronami
48a=48 /48
a=1
podstawiamy a
4 + 2b= 8
2b=4/2
b=2