What two numbers multiply to -243 and add up to -18?

Here we answer the question: "What two numbers multiply to -243 and add up to -18?"

The answer to your question is:

-27 and 9

Below we illustrate and prove that -27 and 9 multiply to -243 and add up to -18:

-27 × 9 = -243
-27 + 9 = -18

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

x² - 18x - 243 = 0

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

(x - 27 ) (x + 9)

To summarize, since -27 and 9 multiply to -243 and add up -18, you know that the following is true:

x² - 18x - 243 = (x - 27 ) (x + 9)

Multiply To One Number and Add Up To Another
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