What two numbers multiply to -658 and add up to 657?

Here we answer the question: "What two numbers multiply to -658 and add up to 657?"

The answer to your question is:

-1 and 658

Below we illustrate and prove that -1 and 658 multiply to -658 and add up to 657:

-1 × 658 = -658
-1 + 658 = 657

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

x² + 657x - 658 = 0

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

(x - 1 ) (x + 658)

To summarize, since -1 and 658 multiply to -658 and add up 657, you know that the following is true:

x² + 657x - 658 = (x - 1 ) (x + 658)

Multiply To One Number and Add Up To Another
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