Question

выполните действие 4корень18 - 13корень72 + 3корень50​

Answer 1

   $4\sqrt{18}-13\sqrt{72} +3\sqrt{50} =$

$=4\sqrt{9*2}-13\sqrt{36*2} +3\sqrt{25*2} =$

$=4*\sqrt{9} *\sqrt{2}-13*\sqrt{36} *\sqrt{2} +3*\sqrt{25} *\sqrt{2} =$

$=4*3 *\sqrt{2}-13*6 *\sqrt{2} +3*5*\sqrt{2} =$

$=12\sqrt{2}-78\sqrt{2} +15\sqrt{2} = -51\sqrt{2}$

Ответ:  $-51\sqrt{2}$

Answer 2

$4\sqrt{18} -13\sqrt{72} +3\sqrt{50} =4\sqrt{3^{2} *2} -13\sqrt{6^{2} *2} +3\sqrt{5^{2} *2} =$

= $= 4*3\sqrt{2} -13*6\sqrt{2} +3*5\sqrt{2} =12\sqrt{2} +15\sqrt{2} -78\sqrt{2} = -51\sqrt{2}$