What two numbers multiply to 420 and add up to -421?

Here we answer the question: "What two numbers multiply to 420 and add up to -421?"

The answer to your question is:

-420 and -1

Below we illustrate and prove that -420 and -1 multiply to 420 and add up to -421:

-420 × -1 = 420
-420 + -1 = -421

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

x² - 421x + 420 = 0

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

(x - 420 ) (x - 1)

To summarize, since -420 and -1 multiply to 420 and add up -421, you know that the following is true:

x² - 421x + 420 = (x - 420 ) (x - 1)

Multiply To One Number and Add Up To Another
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