What two numbers multiply to 780 and add up to 392?

Here we answer the question: "What two numbers multiply to 780 and add up to 392?"

The answer to your question is:

2 and 390

Below we illustrate and prove that 2 and 390 multiply to 780 and add up to 392:

2 × 390 = 780
2 + 390 = 392

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

x² + 392x + 780 = 0

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

(x + 2 ) (x + 390)

To summarize, since 2 and 390 multiply to 780 and add up 392, you know that the following is true:

x² + 392x + 780 = (x + 2 ) (x + 390)

Multiply To One Number and Add Up To Another
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