What two numbers multiply to -800 and add up to 799?

Here we answer the question: "What two numbers multiply to -800 and add up to 799?"

The answer to your question is:

-1 and 800

Below we illustrate and prove that -1 and 800 multiply to -800 and add up to 799:

-1 × 800 = -800
-1 + 800 = 799

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

x² + 799x - 800 = 0

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

(x - 1 ) (x + 800)

To summarize, since -1 and 800 multiply to -800 and add up 799, you know that the following is true:

x² + 799x - 800 = (x - 1 ) (x + 800)

Multiply To One Number and Add Up To Another
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