What two numbers multiply to -8 and add up to -2?

Here we answer the question: "What two numbers multiply to -8 and add up to -2?"

The answer to your question is:

-4 and 2

Below we illustrate and prove that -4 and 2 multiply to -8 and add up to -2:

-4 × 2 = -8
-4 + 2 = -2

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

x² - 2x - 8 = 0

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

(x - 4 ) (x + 2)

To summarize, since -4 and 2 multiply to -8 and add up -2, you know that the following is true:

x² - 2x - 8 = (x - 4 ) (x + 2)

Multiply To One Number and Add Up To Another
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