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The sum of the real numbers x and y is 25. Their difference is 13. What is the value of xy ?

 Feb 14, 2021
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x + y = 25

x - y = 13

-------------

2x = 38 

  x = 19

 

x + y = 25

(19) + y = 25

           y = 6

 

xy 

= (19)(6)

= 114

 Feb 14, 2021

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