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

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

The answer to your question is:

-644 and 1

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

-644 × 1 = -644
-644 + 1 = -643

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

x² - 643x - 644 = 0

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

(x - 644 ) (x + 1)

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

x² - 643x - 644 = (x - 644 ) (x + 1)

Multiply To One Number and Add Up To Another
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