Question

Cat face ? repede va rog

Answer 1

√3²+2²-2×√3×2=2+4-4√3

Answer 2

 $(\sqrt3-2)^2=3-4\sqrt3+4=7-4\sqrt3 \rightarrow\;(\sqrt3-2)^{-2}=\frac{1}{7-4\sqrt3}\;\;\\ pentru\;ca\;a^{-n}=\frac{1}{a^n}$