Question

a) 2radical3×(-4radical7)=
b) 12radical6:(-4radical3)=
c) 2radical18-radical72=

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Answer 1

Pentru a inmultii radicalii
$x \sqrt{y} \times z \sqrt{t} = x \times z \sqrt{y \times t}$
Sper ca te-am ajutat!

Answer 2

$\it a)\ 2\sqrt3\cdot(-4\sqrt7)=-8\sqrt{21}\\ \\ b)\ 12\sqrt6:(-4\sqrt3)=-3\sqrt2\\ \\ c)\ 2\sqrt{18}-\sqrt{72} =2\sqrt{9\cdot2}-\sqrt{36\cdot2}=6\sqrt2-6\sqrt2=0$