What two numbers multiply to -516 and add up to -515?

Here we answer the question: "What two numbers multiply to -516 and add up to -515?"

The answer to your question is:

-516 and 1

Below we illustrate and prove that -516 and 1 multiply to -516 and add up to -515:

-516 × 1 = -516
-516 + 1 = -515

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

x² - 515x - 516 = 0

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

(x - 516 ) (x + 1)

To summarize, since -516 and 1 multiply to -516 and add up -515, you know that the following is true:

x² - 515x - 516 = (x - 516 ) (x + 1)

Multiply To One Number and Add Up To Another
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