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23 October, 14:05

Find two numbers whose difference is 140 and whose product is a minimum

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  1. 23 October, 14:16
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    If x is the smaller number, then the product is x (x+140). This expression describes an upward-opening parabola with zeros at 0 and - 140, hence a minimum at x = - 70.

    Your two numbers are - 70 and 70. Their product is - 4900.
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