$x + y = 10,\ x - y = 2$. Then $xy$ equals

$x + y = 10,\ x - y = 2$. Then $xy$ equals
  1. $24$
  2. $36$
  3. $48$
  4. $20$

Solution

$x = 6, y = 4$. Product $= 24$.

Asked in: MH-SSC-9

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