What two numbers multiply to -642 and add up to 319?

Here we answer the question: "What two numbers multiply to -642 and add up to 319?"

The answer to your question is:

-2 and 321

Below we illustrate and prove that -2 and 321 multiply to -642 and add up to 319:

-2 × 321 = -642
-2 + 321 = 319

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

x² + 319x - 642 = 0

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

(x - 2 ) (x + 321)

To summarize, since -2 and 321 multiply to -642 and add up 319, you know that the following is true:

x² + 319x - 642 = (x - 2 ) (x + 321)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.