What two numbers multiply to -196 and add up to -21?

Here we answer the question: "What two numbers multiply to -196 and add up to -21?"

The answer to your question is:

-28 and 7

Below we illustrate and prove that -28 and 7 multiply to -196 and add up to -21:

-28 × 7 = -196
-28 + 7 = -21

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

x² - 21x - 196 = 0

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

(x - 28 ) (x + 7)

To summarize, since -28 and 7 multiply to -196 and add up -21, you know that the following is true:

x² - 21x - 196 = (x - 28 ) (x + 7)

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.