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:

-18 and 36

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

-18 × 36 = -648
-18 + 36 = 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 - 18 ) (x + 36)

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

x² + 18x - 648 = (x - 18 ) (x + 36)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.