Question

Simplificar raiz de 8 +raiz de 18

Answer 1

raiz de 8= raiz de 4.2
raiz de 18= raiz de 9.2
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√4.2 + √9.2
2√2 + 3√2
5√2

Answer 2

$\sqrt{8} + \sqrt{18} \\ = \sqrt{4\cdot2} + \sqrt{9\cdot2} \\ = \sqrt{4} \cdot\sqrt{2} + \sqrt{9} \cdot\sqrt{2} \\ =2\sqrt{2} + 3\sqrt{2} \\ =5\sqrt{2}$