What two numbers multiply to -405 and add up to -76?

Here we answer the question: "What two numbers multiply to -405 and add up to -76?"

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 -76:

-81 × 5 = -405
-81 + 5 = -76

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

x² - 76x - 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 -76, you know that the following is true:

x² - 76x - 405 = (x - 81 ) (x + 5)

Multiply To One Number and Add Up To Another
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