Iizabela79 Iizabela79 09-03-2015 Matematică a fost răspuns 1-Calculati . a) 4x-x²+6+3x²-5+2x = b) 2•(3x²-4x+1)-4x•(3x-2)= c) (x²-2x+3)•(x²-2x-3)= d) (2x-3)²= e) (4x-3)•(4x+3)= f) (2√3x-3)²-(3√2x+2)² -(√3x+√2)•(√3x-√2)= g) (√7-4√3 - √7+4√3)²= 2- Calculati media aritmetica si media geometrica a numerelor : a=4-2√3 si b=4+2√3 3- Daca x=√2+√3 si y=1+√6 , calculati : (x²-y² +∛3) la 2015