What two numbers multiply to -210 and add up to 11?

Here we answer the question: "What two numbers multiply to -210 and add up to 11?"

The answer to your question is:

-10 and 21

Below we illustrate and prove that -10 and 21 multiply to -210 and add up to 11:

-10 × 21 = -210
-10 + 21 = 11

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

x² + 11x - 210 = 0

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

(x - 10 ) (x + 21)

To summarize, since -10 and 21 multiply to -210 and add up 11, you know that the following is true:

x² + 11x - 210 = (x - 10 ) (x + 21)

Multiply To One Number and Add Up To Another
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