Question

sa se calculeze: 2√18+5√8+3√32-√50 ma puteti ajuta va rog?

Answer 1

= 2√3²·2 +5√2²·2 +3√2²·2²·2 -√7·2²·2
=2·3√2+5·2√2+3·4√2 -2√14
=6√2 +10√2+ 12√2 -2√14 = 28√2-2√14 =2√2 (14-√7)

Answer 2

$2 \sqrt{18} +5 \sqrt{8} +3 \sqrt{32} - \sqrt{50} =2 \cdot 3 \sqrt{2} +5 \cdot 2 \sqrt{2} +3 \cdot 4 \sqrt{2} -5 \sqrt{2} = \\ =6 \sqrt{2} +10 \sqrt{2} +12 \sqrt{2} -5 \sqrt{2} =23 \sqrt{2}$