What two numbers multiply to -429 and add up to 428?

Here we answer the question: "What two numbers multiply to -429 and add up to 428?"

The answer to your question is:

-1 and 429

Below we illustrate and prove that -1 and 429 multiply to -429 and add up to 428:

-1 × 429 = -429
-1 + 429 = 428

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

x² + 428x - 429 = 0

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

(x - 1 ) (x + 429)

To summarize, since -1 and 429 multiply to -429 and add up 428, you know that the following is true:

x² + 428x - 429 = (x - 1 ) (x + 429)

Multiply To One Number and Add Up To Another
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