What two numbers multiply to -800 and add up to -20?

Here we answer the question: "What two numbers multiply to -800 and add up to -20?"

The answer to your question is:

-40 and 20

Below we illustrate and prove that -40 and 20 multiply to -800 and add up to -20:

-40 × 20 = -800
-40 + 20 = -20

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

x² - 20x - 800 = 0

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

(x - 40 ) (x + 20)

To summarize, since -40 and 20 multiply to -800 and add up -20, you know that the following is true:

x² - 20x - 800 = (x - 40 ) (x + 20)

Multiply To One Number and Add Up To Another
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