SOLUTION: Right now we are solving these Quadratic Equations with the zero factor property. The problem is a word problem: If the cost, C, for maunufactoring x units of a certain product i

Question 301587: Right now we are solving these Quadratic Equations with the zero factor
property. The problem is a word problem:
If the cost, C, for maunufactoring x units of a certain product is given
by find the number of units maufactored at a cost of $12,640.
I already started the problem by solving for x and rewriting the
equation in standard form:
that is my ending result, I now have to factor
the quadratic expression but I am stuck, I use the "diamond method" to help
me factor- I need to know what two numbers have the product of -12600 and have the sum of -15.
I can solve the rest of the problem after You help me find those two numbers.
Answer by nyc_function(2741) (Show Source): You can put this solution on YOUR website!
How about using the quadratic formula?
It works every time.
In the quadratic formula, let a = 1, b = -15 and c = -12,600.
Then plug and chug.

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