What two numbers multiply to -679 and add up to 678?

Here we answer the question: "What two numbers multiply to -679 and add up to 678?"

The answer to your question is:

-1 and 679

Below we illustrate and prove that -1 and 679 multiply to -679 and add up to 678:

-1 × 679 = -679
-1 + 679 = 678

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

x² + 678x - 679 = 0

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

(x - 1 ) (x + 679)

To summarize, since -1 and 679 multiply to -679 and add up 678, you know that the following is true:

x² + 678x - 679 = (x - 1 ) (x + 679)

Multiply To One Number and Add Up To Another
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