successes

[wraith path]

i was looking at the answer of a problem, and i didnt understand what they did here

[near jungle]

n in both the numerator and denominator

cancels out

[wraith path]

ye but, where does the "1" in the square root and the n^2 came from?

[frigid crystal]

convert n to $\sqrt{n^2}$ , then "factor" the sqrt

$$

\frac{ \sqrt{n^2 + 4} }{ n }

\frac{ \sqrt{n^2 + 4} }{ \sqrt{n^2} }

\sqrt{\frac{n^2+4}{n^2}}

\sqrt{1 + \frac{4}{n^2}}

$$

i dont know why the fraction rendered like that on the 1st and 2nd line but it is what it is

[little pelican]

lumi
Compile Error! Click the reaction for more information.
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[hazy whale]

it s a factorisation

[frigid crystal]

if somebody sees this i hope you can explain to me how to fix the fraction rendering

[hazy whale]

by n^2

[hazy whale]

what do you need to know?

or to understand

[frigid crystal]

how to fix that

[hazy whale]

it s all about factorization, you don t need to convert n