Find (x + y) + (x - y), ifx=2 5 ,y=1 2 - Vidyadip

Question

Find (x + y) + (x - y), if$\text{x}=\frac{2}{5},\text{y}=\frac{1}{2}$

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Answer

$\text{x}=\frac{2}{5},\text{y}=\frac{1}{2}$
$(\text{x}+\text{y})\div(\text{x}-\text{y})$
$=\Big(\frac{2}{5}+\frac{1}{2}\Big)\div\Big(\frac{2}{5}-\frac{1}{2}\Big)$
$=\Big(\frac{4+5}{10}\Big)\div\Big(\frac{4-5}{10}\Big)$
$=\Big(\frac{4+5}{10}\Big)\times\Big(\frac{10}{4-5}\Big)$
$=\Big(\frac{4+5}{4-5}\Big)$
$=\Big(\frac{9}{-1}\Big)$
$=\Big(-\frac{9}{1}\Big)$

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