What two numbers multiply to -999 and add up to 998?

Here we answer the question: "What two numbers multiply to -999 and add up to 998?"

The answer to your question is:

-1 and 999

Below we illustrate and prove that -1 and 999 multiply to -999 and add up to 998:

-1 × 999 = -999
-1 + 999 = 998

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

x² + 998x - 999 = 0

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

(x - 1 ) (x + 999)

To summarize, since -1 and 999 multiply to -999 and add up 998, you know that the following is true:

x² + 998x - 999 = (x - 1 ) (x + 999)

Multiply To One Number and Add Up To Another
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