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Smallworldsanalolee
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RASPLATESC GENEROS
[tex] | \frac{2 \sqrt{7}+5 }{3 \sqrt{3} } - \frac{2 \sqrt{3} }{4- \sqrt{7} }| :(- \frac{1}{ \sqrt{3} } ) ^{3} [/tex]

Răspuns :

(2√7+5)/3√3=3√3(2√7+5)/27=√3(2√7+5)/9=(2√14+5√3)/9
2√3/(4-√7)=2√3(4+√7)/(16-7)=2√3(4+√7)/9=(8√3+2√21)/9
=I(2√14+5√3)/9-(8√3+2√21)/9I:(-1/3√3)=
=I(2√14+5√3-8√3-2√21)/9I:(-3√3/27)=
=I(2√14-3√3-2√21)/9I:(-√3/9)   :9
=(-√3)(2√14-3√3-2√21)
=-2√42+9+2√62=