What two numbers multiply to -80 and add up to 2?

Here we answer the question: "What two numbers multiply to -80 and add up to 2?"

The answer to your question is:

-8 and 10

Below we illustrate and prove that -8 and 10 multiply to -80 and add up to 2:

-8 × 10 = -80
-8 + 10 = 2

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

x² + 2x - 80 = 0

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

(x - 8 ) (x + 10)

To summarize, since -8 and 10 multiply to -80 and add up 2, you know that the following is true:

x² + 2x - 80 = (x - 8 ) (x + 10)

Multiply To One Number and Add Up To Another
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