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

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

The answer to your question is:

-648 and -1

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

-648 × -1 = 648
-648 + -1 = -649

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

x² - 649x + 648 = 0

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

(x - 648 ) (x - 1)

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

x² - 649x + 648 = (x - 648 ) (x - 1)

Multiply To One Number and Add Up To Another
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