What two numbers multiply to 643 and add up to -644?

Here we answer the question: "What two numbers multiply to 643 and add up to -644?"

The answer to your question is:

-643 and -1

Below we illustrate and prove that -643 and -1 multiply to 643 and add up to -644:

-643 × -1 = 643
-643 + -1 = -644

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

x² - 644x + 643 = 0

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

(x - 643 ) (x - 1)

To summarize, since -643 and -1 multiply to 643 and add up -644, you know that the following is true:

x² - 644x + 643 = (x - 643 ) (x - 1)

Multiply To One Number and Add Up To Another
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