What two numbers multiply to -280 and add up to 279?

Here we answer the question: "What two numbers multiply to -280 and add up to 279?"

The answer to your question is:

-1 and 280

Below we illustrate and prove that -1 and 280 multiply to -280 and add up to 279:

-1 × 280 = -280
-1 + 280 = 279

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

x² + 279x - 280 = 0

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

(x - 1 ) (x + 280)

To summarize, since -1 and 280 multiply to -280 and add up 279, you know that the following is true:

x² + 279x - 280 = (x - 1 ) (x + 280)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.