What two numbers multiply to -397 and add up to 396?

Here we answer the question: "What two numbers multiply to -397 and add up to 396?"

The answer to your question is:

-1 and 397

Below we illustrate and prove that -1 and 397 multiply to -397 and add up to 396:

-1 × 397 = -397
-1 + 397 = 396

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

x² + 396x - 397 = 0

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

(x - 1 ) (x + 397)

To summarize, since -1 and 397 multiply to -397 and add up 396, you know that the following is true:

x² + 396x - 397 = (x - 1 ) (x + 397)

Multiply To One Number and Add Up To Another
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