What two numbers multiply to -720 and add up to -82?

Here we answer the question: "What two numbers multiply to -720 and add up to -82?"

The answer to your question is:

-90 and 8

Below we illustrate and prove that -90 and 8 multiply to -720 and add up to -82:

-90 × 8 = -720
-90 + 8 = -82

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

x² - 82x - 720 = 0

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

(x - 90 ) (x + 8)

To summarize, since -90 and 8 multiply to -720 and add up -82, you know that the following is true:

x² - 82x - 720 = (x - 90 ) (x + 8)

Multiply To One Number and Add Up To Another
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