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

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.

do i do it on a graph?

step-by-step explanation:

hello i am doing good for you that it's summer in your country or state ; )

btw in my country we just have sun and rain as (because i live in the caribbean lol)

also, thx a lot for the points : )