What two numbers multiply to -18 and add up to -7?

Here we answer the question: "What two numbers multiply to -18 and add up to -7?"

The answer to your question is:

-9 and 2

Below we illustrate and prove that -9 and 2 multiply to -18 and add up to -7:

-9 × 2 = -18
-9 + 2 = -7

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

x² - 7x - 18 = 0

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

(x - 9 ) (x + 2)

To summarize, since -9 and 2 multiply to -18 and add up -7, you know that the following is true:

x² - 7x - 18 = (x - 9 ) (x + 2)

Multiply To One Number and Add Up To Another
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