What two numbers multiply to -405 and add up to -404?

Here we answer the question: "What two numbers multiply to -405 and add up to -404?"

The answer to your question is:

-405 and 1

Below we illustrate and prove that -405 and 1 multiply to -405 and add up to -404:

-405 × 1 = -405
-405 + 1 = -404

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

x² - 404x - 405 = 0

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

(x - 405 ) (x + 1)

To summarize, since -405 and 1 multiply to -405 and add up -404, you know that the following is true:

x² - 404x - 405 = (x - 405 ) (x + 1)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.