What two numbers multiply to 390 and add up to 391?

Here we answer the question: "What two numbers multiply to 390 and add up to 391?"

The answer to your question is:

1 and 390

Below we illustrate and prove that 1 and 390 multiply to 390 and add up to 391:

1 × 390 = 390
1 + 390 = 391

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

x² + 391x + 390 = 0

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

(x + 1 ) (x + 390)

To summarize, since 1 and 390 multiply to 390 and add up 391, you know that the following is true:

x² + 391x + 390 = (x + 1 ) (x + 390)

Multiply To One Number and Add Up To Another
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