What two numbers multiply to 18 and add up to -9?

Here we answer the question: "What two numbers multiply to 18 and add up to -9?"

The answer to your question is:

-6 and -3

Below we illustrate and prove that -6 and -3 multiply to 18 and add up to -9:

-6 × -3 = 18
-6 + -3 = -9

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

x² - 9x + 18 = 0

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

(x - 6 ) (x - 3)

To summarize, since -6 and -3 multiply to 18 and add up -9, you know that the following is true:

x² - 9x + 18 = (x - 6 ) (x - 3)

Multiply To One Number and Add Up To Another
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