What two numbers multiply to -810 and add up to 809?

Here we answer the question: "What two numbers multiply to -810 and add up to 809?"

The answer to your question is:

-1 and 810

Below we illustrate and prove that -1 and 810 multiply to -810 and add up to 809:

-1 × 810 = -810
-1 + 810 = 809

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

x² + 809x - 810 = 0

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

(x - 1 ) (x + 810)

To summarize, since -1 and 810 multiply to -810 and add up 809, you know that the following is true:

x² + 809x - 810 = (x - 1 ) (x + 810)

Multiply To One Number and Add Up To Another
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