What two numbers multiply to -648 and add up to -213?

Here we answer the question: "What two numbers multiply to -648 and add up to -213?"

The answer to your question is:

-216 and 3

Below we illustrate and prove that -216 and 3 multiply to -648 and add up to -213:

-216 × 3 = -648
-216 + 3 = -213

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

x² - 213x - 648 = 0

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

(x - 216 ) (x + 3)

To summarize, since -216 and 3 multiply to -648 and add up -213, you know that the following is true:

x² - 213x - 648 = (x - 216 ) (x + 3)

Multiply To One Number and Add Up To Another
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