What two numbers multiply to -196 and add up to -21?




Here we answer the question: "What two numbers multiply to -196 and add up to -21?"

The answer to your question is:

-28 and 7


Below we illustrate and prove that -28 and 7 multiply to -196 and add up to -21:

-28 × 7 = -196
-28 + 7 = -21

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

x2 - 21x - 196 = 0

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

(x - 28 ) (x + 7)

To summarize, since -28 and 7 multiply to -196 and add up -21, you know that the following is true:

x2 - 21x - 196 = (x - 28 ) (x + 7)


Multiply To One Number and Add Up To Another
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