What two numbers multiply to -221 and add up to 220?

Here we answer the question: "What two numbers multiply to -221 and add up to 220?"

The answer to your question is:

-1 and 221

Below we illustrate and prove that -1 and 221 multiply to -221 and add up to 220:

-1 × 221 = -221
-1 + 221 = 220

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

x² + 220x - 221 = 0

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

(x - 1 ) (x + 221)

To summarize, since -1 and 221 multiply to -221 and add up 220, you know that the following is true:

x² + 220x - 221 = (x - 1 ) (x + 221)

Multiply To One Number and Add Up To Another
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