What two numbers multiply to -520 and add up to 519?

Here we answer the question: "What two numbers multiply to -520 and add up to 519?"

The answer to your question is:

-1 and 520

Below we illustrate and prove that -1 and 520 multiply to -520 and add up to 519:

-1 × 520 = -520
-1 + 520 = 519

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

x² + 519x - 520 = 0

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

(x - 1 ) (x + 520)

To summarize, since -1 and 520 multiply to -520 and add up 519, you know that the following is true:

x² + 519x - 520 = (x - 1 ) (x + 520)

Multiply To One Number and Add Up To Another
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