What two numbers multiply to 812 and add up to -408?

Here we answer the question: "What two numbers multiply to 812 and add up to -408?"

The answer to your question is:

-406 and -2

Below we illustrate and prove that -406 and -2 multiply to 812 and add up to -408:

-406 × -2 = 812
-406 + -2 = -408

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

x² - 408x + 812 = 0

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

(x - 406 ) (x - 2)

To summarize, since -406 and -2 multiply to 812 and add up -408, you know that the following is true:

x² - 408x + 812 = (x - 406 ) (x - 2)

Multiply To One Number and Add Up To Another
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