What two numbers multiply to -520 and add up to 99?

Here we answer the question: "What two numbers multiply to -520 and add up to 99?"

The answer to your question is:

-5 and 104

Below we illustrate and prove that -5 and 104 multiply to -520 and add up to 99:

-5 × 104 = -520
-5 + 104 = 99

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

x² + 99x - 520 = 0

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

(x - 5 ) (x + 104)

To summarize, since -5 and 104 multiply to -520 and add up 99, you know that the following is true:

x² + 99x - 520 = (x - 5 ) (x + 104)

Multiply To One Number and Add Up To Another
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