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

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

The answer to your question is:

-78 and -1

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

-78 × -1 = 78
-78 + -1 = -79

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

x² - 79x + 78 = 0

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

(x - 78 ) (x - 1)

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

x² - 79x + 78 = (x - 78 ) (x - 1)

Multiply To One Number and Add Up To Another
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