Here we answer the question: "What two numbers multiply to -250 and add up to -15?"
The answer to your question is:
-25 and 10
Below we illustrate and prove that -25 and 10 multiply to -250 and add up to -15:
-25 × 10 = -250
-25 + 10 = -15
Are you asking because you are trying to figure out how to factor the following quadratic equation?
x2 - 15x - 250 = 0
If so, the solution to factor the quadratic equation above is:
(x - 25 ) (x + 10)
To summarize, since -25 and 10 multiply to -250 and add up -15, you know that the following is true:
x2 - 15x - 250 = (x - 25 ) (x + 10)
Multiply To One Number and Add Up To Another
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