What two numbers multiply to -646 and add up to 321?

Here we answer the question: "What two numbers multiply to -646 and add up to 321?"

The answer to your question is:

-2 and 323

Below we illustrate and prove that -2 and 323 multiply to -646 and add up to 321:

-2 × 323 = -646
-2 + 323 = 321

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

x² + 321x - 646 = 0

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

(x - 2 ) (x + 323)

To summarize, since -2 and 323 multiply to -646 and add up 321, you know that the following is true:

x² + 321x - 646 = (x - 2 ) (x + 323)

Multiply To One Number and Add Up To Another
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