What two numbers multiply to -221 and add up to -4?




Here we answer the question: "What two numbers multiply to -221 and add up to -4?"

The answer to your question is:

-17 and 13


Below we illustrate and prove that -17 and 13 multiply to -221 and add up to -4:

-17 × 13 = -221
-17 + 13 = -4

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

x2 - 4x - 221 = 0

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

(x - 17 ) (x + 13)

To summarize, since -17 and 13 multiply to -221 and add up -4, you know that the following is true:

x2 - 4x - 221 = (x - 17 ) (x + 13)


Multiply To One Number and Add Up To Another
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