What two numbers multiply to -255 and add up to 254?

Here we answer the question: "What two numbers multiply to -255 and add up to 254?"

The answer to your question is:

-1 and 255

Below we illustrate and prove that -1 and 255 multiply to -255 and add up to 254:

-1 × 255 = -255
-1 + 255 = 254

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

x² + 254x - 255 = 0

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

(x - 1 ) (x + 255)

To summarize, since -1 and 255 multiply to -255 and add up 254, you know that the following is true:

x² + 254x - 255 = (x - 1 ) (x + 255)

Multiply To One Number and Add Up To Another
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