Math, asked by mkjlc, 2 months ago

find (X + y)/( x - y), if x = 2 / 5 and y = 1 / 2​

Answers

Answered by BrainlyArnab
0

Answer:

-9

Step-by-step explanation:

If x = 2/5 and y = 1/2

so

 \frac{(x + y)}{(x - y)}  \\  =  \frac{( \frac{2}{5} +  \frac{1}{2} ) }{( \frac{2}{5}  -  \frac{1}{2} )}  \\   \\  =  \frac{( \frac{(2 \times 2) + (1 \times 5)}{10}) }{( \frac{(2 \times 2) - (1 \times 5)}{10}) }  \\  \\  =  \frac{( \frac{4 + 5}{10}) }{( \frac{4 - 5}{10} )}  \\  \\  =  \frac{ (\frac{9}{10} )}{( \frac{ - 1}{10} )} \\  \\  =  \frac{9}{10}  \div  \frac{ - 1}{10}  \\   \\  =  \frac{9}{10}  \times  \frac{10}{ - 1 }  \\  \\  =  \frac{9 \times 10}{10 \times  - 1}  \\  \\  \\  =  \frac{90}{ - 10}  \\  \\  =  - 9

Hence (x + y) / (x - y) = -9

hope it helps.

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