What two numbers multiply to -981 and add up to 980?

Here we answer the question: "What two numbers multiply to -981 and add up to 980?"

The answer to your question is:

-1 and 981

Below we illustrate and prove that -1 and 981 multiply to -981 and add up to 980:

-1 × 981 = -981
-1 + 981 = 980

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

x² + 980x - 981 = 0

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

(x - 1 ) (x + 981)

To summarize, since -1 and 981 multiply to -981 and add up 980, you know that the following is true:

x² + 980x - 981 = (x - 1 ) (x + 981)

Multiply To One Number and Add Up To Another
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