What two numbers multiply to -139 and add up to 138?

Here we answer the question: "What two numbers multiply to -139 and add up to 138?"

The answer to your question is:

-1 and 139

Below we illustrate and prove that -1 and 139 multiply to -139 and add up to 138:

-1 × 139 = -139
-1 + 139 = 138

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

x² + 138x - 139 = 0

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

(x - 1 ) (x + 139)

To summarize, since -1 and 139 multiply to -139 and add up 138, you know that the following is true:

x² + 138x - 139 = (x - 1 ) (x + 139)

Multiply To One Number and Add Up To Another
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