What two numbers multiply to -479 and add up to 478?

Here we answer the question: "What two numbers multiply to -479 and add up to 478?"

The answer to your question is:

-1 and 479

Below we illustrate and prove that -1 and 479 multiply to -479 and add up to 478:

-1 × 479 = -479
-1 + 479 = 478

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

x² + 478x - 479 = 0

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

(x - 1 ) (x + 479)

To summarize, since -1 and 479 multiply to -479 and add up 478, you know that the following is true:

x² + 478x - 479 = (x - 1 ) (x + 479)

Multiply To One Number and Add Up To Another
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