What two numbers multiply to -54 and add up to -15?

Here we answer the question: "What two numbers multiply to -54 and add up to -15?"

The answer to your question is:

-18 and 3

Below we illustrate and prove that -18 and 3 multiply to -54 and add up to -15:

-18 × 3 = -54
-18 + 3 = -15

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

x² - 15x - 54 = 0

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

(x - 18 ) (x + 3)

To summarize, since -18 and 3 multiply to -54 and add up -15, you know that the following is true:

x² - 15x - 54 = (x - 18 ) (x + 3)

Multiply To One Number and Add Up To Another
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