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Namporecla
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Cum rationalizez [tex] \frac{5}{3-2 \sqrt{2} } [/tex] ?

Răspuns :

CarMina03
5/3-2√2=5(3+2√2)/3²-(2√2)²=5(3+2√2)/9-8=5(3+2√2)/1=5(3+2√2)
 [tex] Conjugata\; lui\;3-2\sqrt2 \;este\;3+2\sqrt2\;!\\ \Rightarrow\;\frac{^{3+2\sqrt2)}5}{3-2\sqrt2}=\\ =\frac{5*(3+2\sqrt2)}{(3+2\sqrt2)(3-2\sqrt2)}=\frac{5(3+2\sqrt2)}{3^2-4*2}= ...[/tex]

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