What two numbers multiply to -640 and add up to -318?

Here we answer the question: "What two numbers multiply to -640 and add up to -318?"

The answer to your question is:

-320 and 2

Below we illustrate and prove that -320 and 2 multiply to -640 and add up to -318:

-320 × 2 = -640
-320 + 2 = -318

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

x² - 318x - 640 = 0

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

(x - 320 ) (x + 2)

To summarize, since -320 and 2 multiply to -640 and add up -318, you know that the following is true:

x² - 318x - 640 = (x - 320 ) (x + 2)

Multiply To One Number and Add Up To Another
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