What two numbers multiply to -680 and add up to -679?

Here we answer the question: "What two numbers multiply to -680 and add up to -679?"

The answer to your question is:

-680 and 1

Below we illustrate and prove that -680 and 1 multiply to -680 and add up to -679:

-680 × 1 = -680
-680 + 1 = -679

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

x² - 679x - 680 = 0

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

(x - 680 ) (x + 1)

To summarize, since -680 and 1 multiply to -680 and add up -679, you know that the following is true:

x² - 679x - 680 = (x - 680 ) (x + 1)

Multiply To One Number and Add Up To Another
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