What two numbers multiply to -664 and add up to 663?

Here we answer the question: "What two numbers multiply to -664 and add up to 663?"

The answer to your question is:

-1 and 664

Below we illustrate and prove that -1 and 664 multiply to -664 and add up to 663:

-1 × 664 = -664
-1 + 664 = 663

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

x² + 663x - 664 = 0

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

(x - 1 ) (x + 664)

To summarize, since -1 and 664 multiply to -664 and add up 663, you know that the following is true:

x² + 663x - 664 = (x - 1 ) (x + 664)

Multiply To One Number and Add Up To Another
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