What two numbers multiply to -648 and add up to -18?

Here we answer the question: "What two numbers multiply to -648 and add up to -18?"

The answer to your question is:

-36 and 18

Below we illustrate and prove that -36 and 18 multiply to -648 and add up to -18:

-36 × 18 = -648
-36 + 18 = -18

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

x² - 18x - 648 = 0

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

(x - 36 ) (x + 18)

To summarize, since -36 and 18 multiply to -648 and add up -18, you know that the following is true:

x² - 18x - 648 = (x - 36 ) (x + 18)

Multiply To One Number and Add Up To Another
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