Author Topic: simple simplification qs :) (Read 680 times) Tweet Share

Moko · « **on:** June 25, 2012, 03:14:38 pm »

simplify the following SHOWING FULL WORKING OUT:

x² + y² / x^-2 + y^-2

should be simple, if you get me drift

DisaFear · « **Reply #1 on:** June 25, 2012, 03:30:43 pm »

$=(x^{2}+y^{2})\div (\frac{1}{x^{2}}+\frac{1}{y^{2}})$
$=(x^{2}+y^{2})\div (\frac{x^{2}+y^{2}}{x^{2}y^{2}})$
$=(x^{2}+y^{2})\times \frac{x^{2}y^{2}}{x^{2}+y^{2}}$

$=x^{2}y^{2}$

That?

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Author Topic: simple simplification qs :) (Read 680 times) Tweet Share

Moko

simple simplification qs :)

DisaFear

Re: simple simplification qs :)

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