What two numbers multiply to 405 and add up to -86?

Here we answer the question: "What two numbers multiply to 405 and add up to -86?"

The answer to your question is:

-81 and -5

Below we illustrate and prove that -81 and -5 multiply to 405 and add up to -86:

-81 × -5 = 405
-81 + -5 = -86

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

x² - 86x + 405 = 0

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

(x - 81 ) (x - 5)

To summarize, since -81 and -5 multiply to 405 and add up -86, you know that the following is true:

x² - 86x + 405 = (x - 81 ) (x - 5)

Multiply To One Number and Add Up To Another
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