Question

cum???(√3+1) la puterea 2

Answer 1

(√3+1)² avand in vedere (a+b)²=a²+2ab+b² ⇒ 3+2√3+1=4+2√3
mai detaliat (√3+1)² folosind formula de mai sus
√3²+2√3*1+1² = 3+2√3*1+1² = 3+2√3+1² =3+2√3+1

Answer 2

OBS!!! Formule de calcul prescurtat:

$\boxed{(a+b)^{2}=a^{2}+2ab+b^{2}}$

$\boxed{(a-b)^{2}=a^{2}-2ab+b^{2}}$

$\boxed{(a+b)(a-b)=a^{2}-b^{2}}$


$(\sqrt{3}+1)^{2}=(\sqrt{3})^{2}+2*\sqrt{3}*1+1^{2}=$

$=3+2\sqrt{3}+1=$

$\boxed{=4+2\sqrt{3}}$