Question

1 /raiz quadrada de 4 menos raiz quadrada de 2

Answer 1

$\frac{1}{2-\sqrt{2}} .\frac{2+\sqrt{2}}{2+\sqrt{2}} =\frac{2+\sqrt{2}}{4-2} = \frac{2+\sqrt{2}}{2}$

espero ter ajudado!!!

Answer 2

= 1/(√4 - √2) = 1 /(2 - √2) . (2 + √2)/(2+√2) = (1 + √2)/(2.2+2√2-2√2-√2.√2) = (1+√2)/(4-2) = (1+√2)/2