What two numbers multiply to -810 and add up to -39?

Here we answer the question: "What two numbers multiply to -810 and add up to -39?"

The answer to your question is:

-54 and 15

Below we illustrate and prove that -54 and 15 multiply to -810 and add up to -39:

-54 × 15 = -810
-54 + 15 = -39

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

x² - 39x - 810 = 0

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

(x - 54 ) (x + 15)

To summarize, since -54 and 15 multiply to -810 and add up -39, you know that the following is true:

x² - 39x - 810 = (x - 54 ) (x + 15)

Multiply To One Number and Add Up To Another
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