What two numbers multiply to 84 and add up to -25?

Here we answer the question: "What two numbers multiply to 84 and add up to -25?"

The answer to your question is:

-21 and -4

Below we illustrate and prove that -21 and -4 multiply to 84 and add up to -25:

-21 × -4 = 84
-21 + -4 = -25

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

x² - 25x + 84 = 0

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

(x - 21 ) (x - 4)

To summarize, since -21 and -4 multiply to 84 and add up -25, you know that the following is true:

x² - 25x + 84 = (x - 21 ) (x - 4)

Multiply To One Number and Add Up To Another
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