What two numbers multiply to -648 and add up to -63?

Here we answer the question: "What two numbers multiply to -648 and add up to -63?"

The answer to your question is:

-72 and 9

Below we illustrate and prove that -72 and 9 multiply to -648 and add up to -63:

-72 × 9 = -648
-72 + 9 = -63

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

x² - 63x - 648 = 0

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

(x - 72 ) (x + 9)

To summarize, since -72 and 9 multiply to -648 and add up -63, you know that the following is true:

x² - 63x - 648 = (x - 72 ) (x + 9)

Multiply To One Number and Add Up To Another
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