What two numbers multiply to -721 and add up to -720?

Here we answer the question: "What two numbers multiply to -721 and add up to -720?"

The answer to your question is:

-721 and 1

Below we illustrate and prove that -721 and 1 multiply to -721 and add up to -720:

-721 × 1 = -721
-721 + 1 = -720

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

x² - 720x - 721 = 0

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

(x - 721 ) (x + 1)

To summarize, since -721 and 1 multiply to -721 and add up -720, you know that the following is true:

x² - 720x - 721 = (x - 721 ) (x + 1)

Multiply To One Number and Add Up To Another
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