What two numbers multiply to -423 and add up to 422?

Here we answer the question: "What two numbers multiply to -423 and add up to 422?"

The answer to your question is:

-1 and 423

Below we illustrate and prove that -1 and 423 multiply to -423 and add up to 422:

-1 × 423 = -423
-1 + 423 = 422

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

x² + 422x - 423 = 0

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

(x - 1 ) (x + 423)

To summarize, since -1 and 423 multiply to -423 and add up 422, you know that the following is true:

x² + 422x - 423 = (x - 1 ) (x + 423)

Multiply To One Number and Add Up To Another
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