What two numbers multiply to -399 and add up to 130?

Here we answer the question: "What two numbers multiply to -399 and add up to 130?"

The answer to your question is:

-3 and 133

Below we illustrate and prove that -3 and 133 multiply to -399 and add up to 130:

-3 × 133 = -399
-3 + 133 = 130

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

x² + 130x - 399 = 0

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

(x - 3 ) (x + 133)

To summarize, since -3 and 133 multiply to -399 and add up 130, you know that the following is true:

x² + 130x - 399 = (x - 3 ) (x + 133)

Multiply To One Number and Add Up To Another
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