Question

7 raiz cuadrada de 18 - 3 raiz50

Answer 1

$7 \sqrt{18} - 3 \sqrt{50}=7 \sqrt{2* 3^{2} } -3 \sqrt{2* 5^{2} } =21 \sqrt{2} -15 \sqrt{2}=6 \sqrt{2}$

Saludos.