What two numbers multiply to -780 and add up to -388?

Here we answer the question: "What two numbers multiply to -780 and add up to -388?"

The answer to your question is:

-390 and 2

Below we illustrate and prove that -390 and 2 multiply to -780 and add up to -388:

-390 × 2 = -780
-390 + 2 = -388

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

x² - 388x - 780 = 0

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

(x - 390 ) (x + 2)

To summarize, since -390 and 2 multiply to -780 and add up -388, you know that the following is true:

x² - 388x - 780 = (x - 390 ) (x + 2)

Multiply To One Number and Add Up To Another
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