What two numbers multiply to -403 and add up to 18?

Here we answer the question: "What two numbers multiply to -403 and add up to 18?"

The answer to your question is:

-13 and 31

Below we illustrate and prove that -13 and 31 multiply to -403 and add up to 18:

-13 × 31 = -403
-13 + 31 = 18

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² + 18x - 403 = 0

If so, the solution to factor the quadratic equation above is:

(x - 13 ) (x + 31)

To summarize, since -13 and 31 multiply to -403 and add up 18, you know that the following is true:

x² + 18x - 403 = (x - 13 ) (x + 31)

Multiply To One Number and Add Up To Another
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