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powierzchnia ramy= 3567-2952=615
rama= 4 x²+2*36x+2*82x=615
4x²+236x-615=0
Δ=55696+9840=65536
√Δ=256
x1=[-236-256]/8= sprzeczne, bo l. ujemna
x2=[-236+256]/8=2,5 cm= szerokosc ramy