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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