Question

daca a=|radical 5-radical 3 |
b=|3radical5 - 4radical5
calculați 3a-b
$a$
​ ajutorrrrrrrrr va roggg

Answer 1

$a = | \sqrt{5} - \sqrt{3} | = \sqrt{5} - \sqrt{3}$

$b = |3 \sqrt{5 } - 4 \sqrt{5} | = | - \sqrt{5} | = \sqrt{5}$

$3 \times a - b =3 \times \sqrt{5} - \sqrt{3} - \sqrt{5} = 2 \sqrt{5} - \sqrt{3}$