Question

calculati a)3 radical din 7 +2 radical din 7 +10radical din 7
b)
$\\ b)8 \sqrt{2} + 12 \sqrt{2} + 3 \sqrt{2} \\ c)10 \sqrt{5} - 3 \sqrt{5} + 2 \sqrt{5} \\ d) - 3 \sqrt{3} + 8 \sqrt{3} + 6 \sqrt{3} - 9 \sqrt{3}$
VA ROG AJUTATIMA DAU COROANA ​

Answer 1

a)

$3 \sqrt{7} + 2 \sqrt{7} + 10 \sqrt{7} = (3 + 2 + 10) \sqrt{7} = 15 \sqrt{7}$

b)

$8 \sqrt{2} + 12 \sqrt{2} + 3 \sqrt{2} = (8 + 12 + 20 ) \sqrt{2} = 40 \sqrt{2}$

c)

$10 \sqrt{5} - 3 \sqrt{5} + 2 \sqrt{5} = (10 - 3 + 2) \sqrt{5} = 9 \sqrt{5}$

d)

$- 3 \sqrt{3} + 8 \sqrt{3} + 6 \sqrt{3} - 9 \sqrt{3} = ( - 3 + 8 + 6 - 9) \sqrt{3} = 2 \sqrt{3}$