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De extrascris radical 3,5,radical4,(5) ,radical 3,2 (12)

Răspuns :

[tex] \sqrt{3.5}= \frac{35}{10}= \sqrt{ \frac{7}{2} } = \frac{ \sqrt{7} }{ \sqrt{2} }= \frac{ \sqrt{7} \sqrt{2} }{\sqrt{2}\sqrt{2}}= \frac{\sqrt{14}}{2} [/tex]
[tex] \sqrt{4.(5)}=2*5=10 [/tex]
[tex] \sqrt{3.2(12)}= \sqrt{ \frac{16}{5} }*12=12 \sqrt{ \frac{16}{5} }=12* \frac{4}{ \sqrt{5} }= \frac{12*4}{ \sqrt{5} }= \frac{48}{ \sqrt{5} }= \frac{48 \sqrt{5} }{ \sqrt{5} \sqrt{5}}= \frac{48 \sqrt{5} }{5} [/tex]