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

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

The answer to your question is:

-421 and 1

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

-421 × 1 = -421
-421 + 1 = -420

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

x² - 420x - 421 = 0

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

(x - 421 ) (x + 1)

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

x² - 420x - 421 = (x - 421 ) (x + 1)

Multiply To One Number and Add Up To Another
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