What two numbers multiply to -79 and add up to 78?

Here we answer the question: "What two numbers multiply to -79 and add up to 78?"

The answer to your question is:

-1 and 79

Below we illustrate and prove that -1 and 79 multiply to -79 and add up to 78:

-1 × 79 = -79
-1 + 79 = 78

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

x² + 78x - 79 = 0

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

(x - 1 ) (x + 79)

To summarize, since -1 and 79 multiply to -79 and add up 78, you know that the following is true:

x² + 78x - 79 = (x - 1 ) (x + 79)

Multiply To One Number and Add Up To Another
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