dla x=-2 x(7-x)= prosze nie moge tego rozwiazac wyrazenia algebraiczne ... z gory dziékuje ...
x(7-x)=(-2)*[7-(-2)]=(-2)*(7+2)=-2*9=-18
x=-2
(-2)*((7-(-2))=(-2)*9=-18
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x(7-x)=(-2)*[7-(-2)]=(-2)*(7+2)=-2*9=-18
x=-2
(-2)*((7-(-2))=(-2)*9=-18