What two numbers multiply to -216 and add up to -215?

Here we answer the question: "What two numbers multiply to -216 and add up to -215?"

The answer to your question is:

-216 and 1

Below we illustrate and prove that -216 and 1 multiply to -216 and add up to -215:

-216 × 1 = -216
-216 + 1 = -215

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

x² - 215x - 216 = 0

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

(x - 216 ) (x + 1)

To summarize, since -216 and 1 multiply to -216 and add up -215, you know that the following is true:

x² - 215x - 216 = (x - 216 ) (x + 1)

Multiply To One Number and Add Up To Another
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