Question

Calculați
$\sqrt{ {13}^{2} } + \sqrt{121 }$
$\sqrt{18 } - \sqrt{162} + \sqrt{98}$
$(2 \sqrt{20} - 3 \sqrt{45} ) \div (5 \sqrt{5)}$
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Answer 1

13+11=24

3√2-9√2+7√2=√2

(2·2√5-3·3√5):5√5=(4√5-9√5):5√5=(-5√5):5√5=-1

Answer 2

Răspuns:

√13²+√121 = 13+11 = 24

√18 - √162+√98 = 3√2-9√2+7√2 = (3-9+7)√2 =

= (-6+7)√2 = 1√2 = √2

(2√20-3√45):5√5 = (4√5-9√5):5√5 = (-5√5):5√5 = -1

==EVERGREEN==