What two numbers multiply to -80 and add up to 11?

Here we answer the question: "What two numbers multiply to -80 and add up to 11?"

The answer to your question is:

-5 and 16

Below we illustrate and prove that -5 and 16 multiply to -80 and add up to 11:

-5 × 16 = -80
-5 + 16 = 11

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

x² + 11x - 80 = 0

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

(x - 5 ) (x + 16)

To summarize, since -5 and 16 multiply to -80 and add up 11, you know that the following is true:

x² + 11x - 80 = (x - 5 ) (x + 16)

Multiply To One Number and Add Up To Another
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