What two numbers multiply to -979 and add up to 78?

Here we answer the question: "What two numbers multiply to -979 and add up to 78?"

The answer to your question is:

-11 and 89

Below we illustrate and prove that -11 and 89 multiply to -979 and add up to 78:

-11 × 89 = -979
-11 + 89 = 78

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

x² + 78x - 979 = 0

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

(x - 11 ) (x + 89)

To summarize, since -11 and 89 multiply to -979 and add up 78, you know that the following is true:

x² + 78x - 979 = (x - 11 ) (x + 89)

Multiply To One Number and Add Up To Another
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