What two numbers multiply to 390 and add up to -83?

Here we answer the question: "What two numbers multiply to 390 and add up to -83?"

The answer to your question is:

-78 and -5

Below we illustrate and prove that -78 and -5 multiply to 390 and add up to -83:

-78 × -5 = 390
-78 + -5 = -83

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

x² - 83x + 390 = 0

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

(x - 78 ) (x - 5)

To summarize, since -78 and -5 multiply to 390 and add up -83, you know that the following is true:

x² - 83x + 390 = (x - 78 ) (x - 5)

Multiply To One Number and Add Up To Another
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