What two numbers multiply to 820 and add up to -821?

Here we answer the question: "What two numbers multiply to 820 and add up to -821?"

The answer to your question is:

-820 and -1

Below we illustrate and prove that -820 and -1 multiply to 820 and add up to -821:

-820 × -1 = 820
-820 + -1 = -821

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

x² - 821x + 820 = 0

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

(x - 820 ) (x - 1)

To summarize, since -820 and -1 multiply to 820 and add up -821, you know that the following is true:

x² - 821x + 820 = (x - 820 ) (x - 1)

Multiply To One Number and Add Up To Another
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