Răspunsuri

2014-11-12T13:15:24+02:00
4-4√3+3=7-4√3
5-6√5+9=14-6√5
Mai ma poti ajura ,e urgent ? !
(a-b)^2=a^2-2*a*b+b^2, formula, ce e asa complicat ?!
2014-11-12T13:29:05+02:00
•(2-√3)² =2^2-2*2*(-√3)+(-√3)^2=4+4√3+3=4√3+7 •(-√5+3)² =(-√5)^2+2*(-√5)*3+3^2=5-2√5*3+9=5-6√5+9=-6√5+14