What two numbers multiply to -638 and add up to -637?

Here we answer the question: "What two numbers multiply to -638 and add up to -637?"

The answer to your question is:

-638 and 1

Below we illustrate and prove that -638 and 1 multiply to -638 and add up to -637:

-638 × 1 = -638
-638 + 1 = -637

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

x² - 637x - 638 = 0

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

(x - 638 ) (x + 1)

To summarize, since -638 and 1 multiply to -638 and add up -637, you know that the following is true:

x² - 637x - 638 = (x - 638 ) (x + 1)

Multiply To One Number and Add Up To Another
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