What two numbers multiply to 104 and add up to -21?

Here we answer the question: "What two numbers multiply to 104 and add up to -21?"

The answer to your question is:

-13 and -8

Below we illustrate and prove that -13 and -8 multiply to 104 and add up to -21:

-13 × -8 = 104
-13 + -8 = -21

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

x² - 21x + 104 = 0

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

(x - 13 ) (x - 8)

To summarize, since -13 and -8 multiply to 104 and add up -21, you know that the following is true:

x² - 21x + 104 = (x - 13 ) (x - 8)

Multiply To One Number and Add Up To Another
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