Răspuns :
3-2√2=1-2√2+2
3-2√2=3√2
11-6√2=9-2×3×√2×2+2
11-6√2=11-5√2
se rezolva din formula (a-b) ^2=a^2-2ab+b^2
3-2√2=3√2
11-6√2=9-2×3×√2×2+2
11-6√2=11-5√2
se rezolva din formula (a-b) ^2=a^2-2ab+b^2