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:

-1 and 649

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

-1 × 649 = -649
-1 + 649 = 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 - 1 ) (x + 649)

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

x² + 648x - 649 = (x - 1 ) (x + 649)

Multiply To One Number and Add Up To Another
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