The difference between two positive numbers is 5 and the sum of their squares is 73. Find the product of these numbers.
A
24
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B
22
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C
16
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D
32
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Solution
The correct option is A24 Let the two number be x and y Therefore, x−y=5 and x2+y2=73 Now, (x−y)2=x2+y2−2xy =>(5)2=73−2xy =>25=73−2xy =>2xy=73−25 =>xy=482 =>xy=24 Therefore, product of xy is 24.