What two numbers multiply to -280 and add up to 18?

Here we answer the question: "What two numbers multiply to -280 and add up to 18?"

The answer to your question is:

-10 and 28

Below we illustrate and prove that -10 and 28 multiply to -280 and add up to 18:

-10 × 28 = -280
-10 + 28 = 18

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

x² + 18x - 280 = 0

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

(x - 10 ) (x + 28)

To summarize, since -10 and 28 multiply to -280 and add up 18, you know that the following is true:

x² + 18x - 280 = (x - 10 ) (x + 28)

Multiply To One Number and Add Up To Another
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