What two numbers multiply to -644 and add up to 320?

Here we answer the question: "What two numbers multiply to -644 and add up to 320?"

The answer to your question is:

-2 and 322

Below we illustrate and prove that -2 and 322 multiply to -644 and add up to 320:

-2 × 322 = -644
-2 + 322 = 320

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

x² + 320x - 644 = 0

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

(x - 2 ) (x + 322)

To summarize, since -2 and 322 multiply to -644 and add up 320, you know that the following is true:

x² + 320x - 644 = (x - 2 ) (x + 322)

Multiply To One Number and Add Up To Another
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