przekształć wzór by otrzymać  h P= 2ab +2ah +2bh

P=2ab+2ah+2bh P-2ab=2ah+2bh P-2ab= h(2a+2b) (P-2ab):(2a+2b)=h liczę na naj :D

[latex]P=2ab +2ah +2bh[/latex] [latex]2ah +2bh=P-2ab[/latex] [latex]h(2a +2b)=P-2ab /:(2a +2b)[/latex] [latex]h=frac{P-2ab}{2a +2b}[/latex] [latex]h=frac{P-2ab}{2(a +b)}[/latex]