Question

Calc. folosind formulele de calcul prescurtat:
a) (2√3-1)^2-(2√2-1)(2√2+1)
b) (2√3+3)(2√3-3)-(√2-1)(√2+1)
REPEDE!!!:)

Answer 1

a)12-4√3+1-(8-1)=
   13-4√3-7=
    6-4√3=
    2(3-2√3)

b)12-9-(2-1)=
    3-1=
    2