What two numbers multiply to -669 and add up to 668?

Here we answer the question: "What two numbers multiply to -669 and add up to 668?"

The answer to your question is:

-1 and 669

Below we illustrate and prove that -1 and 669 multiply to -669 and add up to 668:

-1 × 669 = -669
-1 + 669 = 668

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

x² + 668x - 669 = 0

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

(x - 1 ) (x + 669)

To summarize, since -1 and 669 multiply to -669 and add up 668, you know that the following is true:

x² + 668x - 669 = (x - 1 ) (x + 669)

Multiply To One Number and Add Up To Another
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