What two numbers multiply to -655 and add up to 654?

Here we answer the question: "What two numbers multiply to -655 and add up to 654?"

The answer to your question is:

-1 and 655

Below we illustrate and prove that -1 and 655 multiply to -655 and add up to 654:

-1 × 655 = -655
-1 + 655 = 654

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

x² + 654x - 655 = 0

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

(x - 1 ) (x + 655)

To summarize, since -1 and 655 multiply to -655 and add up 654, you know that the following is true:

x² + 654x - 655 = (x - 1 ) (x + 655)

Multiply To One Number and Add Up To Another
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