What two numbers multiply to -218 and add up to 217?




Here we answer the question: "What two numbers multiply to -218 and add up to 217?"

The answer to your question is:

-1 and 218


Below we illustrate and prove that -1 and 218 multiply to -218 and add up to 217:

-1 × 218 = -218
-1 + 218 = 217

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

x2 + 217x - 218 = 0

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

(x - 1 ) (x + 218)

To summarize, since -1 and 218 multiply to -218 and add up 217, you know that the following is true:

x2 + 217x - 218 = (x - 1 ) (x + 218)


Multiply To One Number and Add Up To Another
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