What two numbers multiply to -816 and add up to -406?

Here we answer the question: "What two numbers multiply to -816 and add up to -406?"

The answer to your question is:

-408 and 2

Below we illustrate and prove that -408 and 2 multiply to -816 and add up to -406:

-408 × 2 = -816
-408 + 2 = -406

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

x² - 406x - 816 = 0

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

(x - 408 ) (x + 2)

To summarize, since -408 and 2 multiply to -816 and add up -406, you know that the following is true:

x² - 406x - 816 = (x - 408 ) (x + 2)

Multiply To One Number and Add Up To Another
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