Question

Calculați:

a)
$27 \sqrt{3} - 13 \sqrt{5 } + 21 \sqrt{7} - 3 \sqrt{3} + 5 \sqrt{5} =$

b)
$12 \sqrt{3} \times \sqrt{2} + 12 \sqrt{5} - 12 \sqrt{6} + 2 =$
c)
$21 \sqrt{3} \div 7 + 3 \sqrt{15} \times 2 \sqrt{5} - 2 \sqrt{3} =$
​

Answer 1

Răspuns:

Sper ca e bine..................