Odpowiedzi

2009-04-07T09:04:15+02:00
X,y boki

2x+2y=L-------->y=L/2-x
xy=P------>L/2x-x²=P
x²-L/2x+P=0
Δ=L²/4-4P
x1=L/4-1/2√Δ------>y1=L/2-x1
x1=L/4+1/2√Δ------>y2=L/2-x2
teraz mam inny pomysl !!!!
przekatna d²=x²+y²---->d²=(x+y)²-2xy
x+y=L/2
xy=P

d²=L²/4-2P----->d=√(L²/4-2P)