What two numbers multiply to -231 and add up to -10?




Here we answer the question: "What two numbers multiply to -231 and add up to -10?"

The answer to your question is:

-21 and 11


Below we illustrate and prove that -21 and 11 multiply to -231 and add up to -10:

-21 × 11 = -231
-21 + 11 = -10

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

x2 - 10x - 231 = 0

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

(x - 21 ) (x + 11)

To summarize, since -21 and 11 multiply to -231 and add up -10, you know that the following is true:

x2 - 10x - 231 = (x - 21 ) (x + 11)


Multiply To One Number and Add Up To Another
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