2.Calculeaza:
a)(2+√3) la a doua
b)(1+√2) la a doua
c)(√5+2)la a doua
d)(2√3+1)la a doua
e)(√3-2) la a doua
f)(2-√2) la a doua
g)(3-√3) la a doua
h)(3√2-1)la a doua
i)(1+√3)(1-√3)
j)(3√2-1)(3√2+1)
k)(√3+5)(5-√3)
l)(2√2-3)(2√2+3)