Help on dividing radicals
\[\frac{ 4 }{ 5\sqrt{2} }\]
yes
@23coffmank thats my question
@hartnn @ParthKohli
have you tried rationalizing the denominator? by multiplying numerator and denominator by \(\sqrt 2\)
i get 20+4sqrt2/22 for some reason
:O \(\Large \dfrac{4 \times \sqrt 2}{5 \sqrt 2 \times \sqrt 2} \) whats \(\sqrt 2 \times \sqrt 2 = ... ?\)
and the denominator for my possible answers are 23 and 27
the numerator is a negative in the possible answers.
thats 2 right
yes. and your "possible answers" are weird. Can you post the screenshot of the question along with options/possible answers?
\(\Large \dfrac{4 \times \sqrt 2}{5 \sqrt 2 \times \sqrt 2} = \Large \dfrac{4 \times \sqrt 2}{5 \times 2} = \dfrac{2\sqrt 2}{5}\) thats it!
no...not only options, question alongwith options...
ahh ... i think your denominator is \(5 - \sqrt 2\)
the question says- Rationalize the denominator of (insert the equation first posted)
or more possibly \(5+\sqrt 2\)
it says +
hmm...you should've posted your question accurately. anyways, rationalize the denominator by multiplying numerator and denominator by \(5-\sqrt 2\)
how you got 22? \(5^2 -(\sqrt 2)^2 = 25-2 = 23\) in the denominator
and since the numerator is \(4\times(5-\sqrt 2)\) it'll be \(20 - 4\sqrt 2\)
ask if any doubts :)
Thank you!!
welcome ^_^
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