Răspunsuri

2014-10-27T19:06:11+02:00
Mg=√axb
axb=(8-√28)x(2√7+8)=8·2+8·8-2√2²·7²-8√2²·7=16+64-2·2·7-8·2√7=16+64-28-16√7=52-16√7
mg= \sqrt{52-16√7}