Question

Sa se efectueze:
a)$\sqrt{8} + \sqrt{18} + \sqrt{32} - \sqrt{200}$

Answer 1

=√4√2  + √9√2 + √16√2 - √100√2
= 2√2  + 3√2 + 4√2 - 10√2 
= ( 2 + 3 +4 - 10) ·√2 
 = - √2

Answer 2

$\sqrt{8} + \sqrt{18} + \sqrt{32} - \sqrt{200} = \\ =2 \sqrt{2} +3 \sqrt{2} +4 \sqrt{2} -10 \sqrt{2} = \\ =5 \sqrt{2} +4 \sqrt{2} -10 \sqrt{2} = \\ =9 \sqrt{2} -10 \sqrt{2} = \\ =- \sqrt{2}$