What two numbers multiply to -978 and add up to 487?

Here we answer the question: "What two numbers multiply to -978 and add up to 487?"

The answer to your question is:

-2 and 489

Below we illustrate and prove that -2 and 489 multiply to -978 and add up to 487:

-2 × 489 = -978
-2 + 489 = 487

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

x² + 487x - 978 = 0

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

(x - 2 ) (x + 489)

To summarize, since -2 and 489 multiply to -978 and add up 487, you know that the following is true:

x² + 487x - 978 = (x - 2 ) (x + 489)

Multiply To One Number and Add Up To Another
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