Question
The sum of two numbers is 25 and their difference is 13, Find their product.
Answer: Option B
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Let the numbers be `x` and y. Then , `x + y` = 25 and `x - y` = 13
4`xy `= `(x +y)^2 - (x - y)^3`= `(25)^2 - (14)^2` = 625 - 169 = 456 `rArr` `xy` = 114
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