What two numbers multiply to 518 and add up to -81?

Here we answer the question: "What two numbers multiply to 518 and add up to -81?"

The answer to your question is:

-74 and -7

Below we illustrate and prove that -74 and -7 multiply to 518 and add up to -81:

-74 × -7 = 518
-74 + -7 = -81

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

x² - 81x + 518 = 0

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

(x - 74 ) (x - 7)

To summarize, since -74 and -7 multiply to 518 and add up -81, you know that the following is true:

x² - 81x + 518 = (x - 74 ) (x - 7)

Multiply To One Number and Add Up To Another
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