What two numbers multiply to -621 and add up to 620?

Here we answer the question: "What two numbers multiply to -621 and add up to 620?"

The answer to your question is:

-1 and 621

Below we illustrate and prove that -1 and 621 multiply to -621 and add up to 620:

-1 × 621 = -621
-1 + 621 = 620

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

x² + 620x - 621 = 0

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

(x - 1 ) (x + 621)

To summarize, since -1 and 621 multiply to -621 and add up 620, you know that the following is true:

x² + 620x - 621 = (x - 1 ) (x + 621)

Multiply To One Number and Add Up To Another
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