What two numbers multiply to -408 and add up to -407?

Here we answer the question: "What two numbers multiply to -408 and add up to -407?"

The answer to your question is:

-408 and 1

Below we illustrate and prove that -408 and 1 multiply to -408 and add up to -407:

-408 × 1 = -408
-408 + 1 = -407

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

x² - 407x - 408 = 0

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

(x - 408 ) (x + 1)

To summarize, since -408 and 1 multiply to -408 and add up -407, you know that the following is true:

x² - 407x - 408 = (x - 408 ) (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.