What two numbers multiply to 810 and add up to -407?

Here we answer the question: "What two numbers multiply to 810 and add up to -407?"

The answer to your question is:

-405 and -2

Below we illustrate and prove that -405 and -2 multiply to 810 and add up to -407:

-405 × -2 = 810
-405 + -2 = -407

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

x² - 407x + 810 = 0

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

(x - 405 ) (x - 2)

To summarize, since -405 and -2 multiply to 810 and add up -407, you know that the following is true:

x² - 407x + 810 = (x - 405 ) (x - 2)

Multiply To One Number and Add Up To Another
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