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dau coroana!!!
Repedee​


Dau CoroanaRepedee class=

Răspuns :

Răspuns:

a) 5√6

Explicație pas cu pas:

a) Extragem radicalii

3√2(7√3-6√3+10√3-12√3)+4√3(5√2-4√2+8√2-7√2)=

=3√2·(-√3)+4√3·2√2=

=-3√6+8√6=

=5√6

b)

[tex]\it = \sqrt{9\cdot3}(\sqrt{16\cdot2}-\sqrt{36\cdot2}+\sqrt{81\cdot2}-\sqrt{144\cdot2})+\\ \\ +\sqrt{4\cdot2}(\sqrt{36\cdot3}-\sqrt{64\cdot3}+\sqrt{81\cdot3}-\sqrt{25\cdot3})=\\ \\ =3\sqrt3(4\sqrt{2}-6\sqrt{2}+9\sqrt{2}-12\sqrt{2})+2\sqrt{2}(6\sqrt{3}-8\sqrt{3}+9\sqrt{3}-5\sqrt{3})=\\ \\ =3\sqrt{3}\cdot(-5\sqrt{2})+2\sqrt{2}\cdot2\sqrt{3}=-15\sqrt{6}+4\sqrt{6}=-11\sqrt{6}[/tex]