What two numbers multiply to -900 and add up to 221?

Here we answer the question: "What two numbers multiply to -900 and add up to 221?"

The answer to your question is:

-4 and 225

Below we illustrate and prove that -4 and 225 multiply to -900 and add up to 221:

-4 × 225 = -900
-4 + 225 = 221

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

x² + 221x - 900 = 0

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

(x - 4 ) (x + 225)

To summarize, since -4 and 225 multiply to -900 and add up 221, you know that the following is true:

x² + 221x - 900 = (x - 4 ) (x + 225)

Multiply To One Number and Add Up To Another
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