What two numbers multiply to -280 and add up to 138?

Here we answer the question: "What two numbers multiply to -280 and add up to 138?"

The answer to your question is:

-2 and 140

Below we illustrate and prove that -2 and 140 multiply to -280 and add up to 138:

-2 × 140 = -280
-2 + 140 = 138

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

x² + 138x - 280 = 0

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

(x - 2 ) (x + 140)

To summarize, since -2 and 140 multiply to -280 and add up 138, you know that the following is true:

x² + 138x - 280 = (x - 2 ) (x + 140)

Multiply To One Number and Add Up To Another
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