What two numbers multiply to -820 and add up to -408?

Here we answer the question: "What two numbers multiply to -820 and add up to -408?"

The answer to your question is:

-410 and 2

Below we illustrate and prove that -410 and 2 multiply to -820 and add up to -408:

-410 × 2 = -820
-410 + 2 = -408

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

x² - 408x - 820 = 0

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

(x - 410 ) (x + 2)

To summarize, since -410 and 2 multiply to -820 and add up -408, you know that the following is true:

x² - 408x - 820 = (x - 410 ) (x + 2)

Multiply To One Number and Add Up To Another
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