Răspunsuri

2014-11-15T12:06:11+02:00
1/a+1/b= aducem la acelasi numitor comun
(a+b)/a*b=4/2=2

ac+ad+bc+bd=4√3
a(c+d)+b(c+d)=4√3
(c+d)(a+b)=4√3
(c+d)*4=4√3
c+d=4√3:4
c+d=√3