What two numbers multiply to -80 and add up to -2?

Here we answer the question: "What two numbers multiply to -80 and add up to -2?"

The answer to your question is:

-10 and 8

Below we illustrate and prove that -10 and 8 multiply to -80 and add up to -2:

-10 × 8 = -80
-10 + 8 = -2

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

x² - 2x - 80 = 0

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

(x - 10 ) (x + 8)

To summarize, since -10 and 8 multiply to -80 and add up -2, you know that the following is true:

x² - 2x - 80 = (x - 10 ) (x + 8)

Multiply To One Number and Add Up To Another
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