What two numbers multiply to -820 and add up to -21?

Here we answer the question: "What two numbers multiply to -820 and add up to -21?"

The answer to your question is:

-41 and 20

Below we illustrate and prove that -41 and 20 multiply to -820 and add up to -21:

-41 × 20 = -820
-41 + 20 = -21

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

x² - 21x - 820 = 0

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

(x - 41 ) (x + 20)

To summarize, since -41 and 20 multiply to -820 and add up -21, you know that the following is true:

x² - 21x - 820 = (x - 41 ) (x + 20)

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.