What two numbers multiply to 21 and add up to -22?

Here we answer the question: "What two numbers multiply to 21 and add up to -22?"

The answer to your question is:

-21 and -1

Below we illustrate and prove that -21 and -1 multiply to 21 and add up to -22:

-21 × -1 = 21
-21 + -1 = -22

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

x² - 22x + 21 = 0

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

(x - 21 ) (x - 1)

To summarize, since -21 and -1 multiply to 21 and add up -22, you know that the following is true:

x² - 22x + 21 = (x - 21 ) (x - 1)

Multiply To One Number and Add Up To Another
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