What two numbers multiply to -80 and add up to -79?

Here we answer the question: "What two numbers multiply to -80 and add up to -79?"

The answer to your question is:

-80 and 1

Below we illustrate and prove that -80 and 1 multiply to -80 and add up to -79:

-80 × 1 = -80
-80 + 1 = -79

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

x² - 79x - 80 = 0

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

(x - 80 ) (x + 1)

To summarize, since -80 and 1 multiply to -80 and add up -79, you know that the following is true:

x² - 79x - 80 = (x - 80 ) (x + 1)

Multiply To One Number and Add Up To Another
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