Question

Ajutor...
1. √27 + √12 - √75
2. 2√8 + 3√18 - 13√2

Answer 1

$1) \sqrt{27} + \sqrt{12} - \sqrt{75}$

$= 3 \sqrt{3} + 2 \sqrt{3} - 5 \sqrt{3}$

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

$= 0$

$2)2 \sqrt{8} + 3 \sqrt{18} - 13 \sqrt{2}$

$= 2 \times 2 \sqrt{2} + 3 \times 3 \sqrt{2} - 13 \sqrt{2}$

$= 4 \sqrt{2} + 9 \sqrt{2} - 13 \sqrt{2}$

$= 13 \sqrt{2} - 13 \sqrt{2}$

$= 0$

Answer 2

$3 \sqrt{3} + 2 \sqrt{3} - 5 \sqrt{3} = 5 \sqrt{3} - 5 \sqrt{3} = 0$
Asta e la 1.
Iar la 2 e ceva mai complicat dar stai putin sa calculez.
$4 \sqrt{2} + 9 \sqrt{2} - 13 \sqrt{2} = 13 \sqrt{2} - 13 \sqrt{2} = 0$