What two numbers multiply to -784 and add up to -390?

Here we answer the question: "What two numbers multiply to -784 and add up to -390?"

The answer to your question is:

-392 and 2

Below we illustrate and prove that -392 and 2 multiply to -784 and add up to -390:

-392 × 2 = -784
-392 + 2 = -390

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

x² - 390x - 784 = 0

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

(x - 392 ) (x + 2)

To summarize, since -392 and 2 multiply to -784 and add up -390, you know that the following is true:

x² - 390x - 784 = (x - 392 ) (x + 2)

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.