What two numbers multiply to 398 and add up to -399?

Here we answer the question: "What two numbers multiply to 398 and add up to -399?"

The answer to your question is:

-398 and -1

Below we illustrate and prove that -398 and -1 multiply to 398 and add up to -399:

-398 × -1 = 398
-398 + -1 = -399

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

x² - 399x + 398 = 0

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

(x - 398 ) (x - 1)

To summarize, since -398 and -1 multiply to 398 and add up -399, you know that the following is true:

x² - 399x + 398 = (x - 398 ) (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.