What two numbers multiply to -217 and add up to -216?

Here we answer the question: "What two numbers multiply to -217 and add up to -216?"

The answer to your question is:

-217 and 1

Below we illustrate and prove that -217 and 1 multiply to -217 and add up to -216:

-217 × 1 = -217
-217 + 1 = -216

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

x² - 216x - 217 = 0

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

(x - 217 ) (x + 1)

To summarize, since -217 and 1 multiply to -217 and add up -216, you know that the following is true:

x² - 216x - 217 = (x - 217 ) (x + 1)

Multiply To One Number and Add Up To Another
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