Math, asked by poonambhadauriya8106, 7 months ago

if x+y=9 x-y=7 ,find xy​

Answers

Answered by sonirakesh0521
3

sorry mate do not know the answer ............

Answered by Anonymous
0

Answer:

 xy =  \frac{(x + y) {}^{2} }{2} -  \frac{(x - y) {}^{} }{2}^{2}  \\ xy =  \frac{(9) {}^{2} }{2}  -  \frac{(7) {}^{2} }{2}  \\ xy =  \frac{81}{2}  -  \frac{49}{2}  \\ xy = 40.5 - 24.5 \\ xy = 16

here is your answer

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