What two numbers multiply to -649 and add up to -648?

Here we answer the question: "What two numbers multiply to -649 and add up to -648?"

The answer to your question is:

-649 and 1

Below we illustrate and prove that -649 and 1 multiply to -649 and add up to -648:

-649 × 1 = -649
-649 + 1 = -648

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

x² - 648x - 649 = 0

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

(x - 649 ) (x + 1)

To summarize, since -649 and 1 multiply to -649 and add up -648, you know that the following is true:

x² - 648x - 649 = (x - 649 ) (x + 1)

Multiply To One Number and Add Up To Another
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