Question

efetue: (3 - √2) elevado a 2​

Answer 1

$\Large\boxed{\begin{array}{l}\sf(3-\sqrt{2})^2=3^2-2\cdot3\cdot\sqrt{2}+(\sqrt{2})^2\\\sf (3-\sqrt{2})^2=9-6\sqrt{2}+2\\\sf (3-\sqrt{2})^2=11-6\sqrt{2}\end{array}}$