Question

radical din 5 - 1 totul la 2 -radical 80 =?

Answer 1

radical 5 ^ -1 se poate scrie ca 1/radical 5. radical 80=4 radical 5. si vine (1/radical 5)^2- 4radical 5=> 2-4 radical 5/radical 5. se rationalizeaza si => -6 radical 5/5

Answer 2

$\sqrt{5} =2.23 \\ \sqrt{80} =8.94 \\ \frac{2.23-1}{2-8.94} = \frac{1,23}{-6,94} =-0,17$