Obliczenie: rhvWfy - 1
S_boc =
2* ( a* b+ b* c+ a* c)
2* ( a* b+ b* c+ a* c)
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S_boc = 2* ( a* b+ b* c+ a* c)$$S_{boc}$$ = $$2\cdot (a\cdot b+b\cdot c+a\cdot c)$$
S_boc = 2* a* b+ 2* b* c+ 2* a* c$$S_{boc}$$ = $$2\cdot a\cdot b+2\cdot b\cdot c+2\cdot a\cdot c$$