What two numbers multiply to 978 and add up to -491?

Here we answer the question: "What two numbers multiply to 978 and add up to -491?"

The answer to your question is:

-489 and -2

Below we illustrate and prove that -489 and -2 multiply to 978 and add up to -491:

-489 × -2 = 978
-489 + -2 = -491

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

x² - 491x + 978 = 0

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

(x - 489 ) (x - 2)

To summarize, since -489 and -2 multiply to 978 and add up -491, you know that the following is true:

x² - 491x + 978 = (x - 489 ) (x - 2)

Multiply To One Number and Add Up To Another
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