3. Efectuaţi calculele:
a) (√3+1)²-√3 (4+3√3);
2 (√2 + 3)² - 4√² (3-√2);
d) 3(√3-1) -√3 (√3-6)-(√TI-√2)(√TI + √2);
e)
) (2√5 + 1)² + (√7 + √2)(√7 – √2) – √80;
f)
(5√3-7)(5√3+7)-(3√3 −1)² – √108.
