What two numbers multiply to -440 and add up to 439?

Here we answer the question: "What two numbers multiply to -440 and add up to 439?"

The answer to your question is:

-1 and 440

Below we illustrate and prove that -1 and 440 multiply to -440 and add up to 439:

-1 × 440 = -440
-1 + 440 = 439

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

x² + 439x - 440 = 0

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

(x - 1 ) (x + 440)

To summarize, since -1 and 440 multiply to -440 and add up 439, you know that the following is true:

x² + 439x - 440 = (x - 1 ) (x + 440)

Multiply To One Number and Add Up To Another
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