What two numbers multiply to -390 and add up to -389?

Here we answer the question: "What two numbers multiply to -390 and add up to -389?"

The answer to your question is:

-390 and 1

Below we illustrate and prove that -390 and 1 multiply to -390 and add up to -389:

-390 × 1 = -390
-390 + 1 = -389

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

x² - 389x - 390 = 0

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

(x - 390 ) (x + 1)

To summarize, since -390 and 1 multiply to -390 and add up -389, you know that the following is true:

x² - 389x - 390 = (x - 390 ) (x + 1)

Multiply To One Number and Add Up To Another
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