What two numbers multiply to -225 and add up to -16?




Here we answer the question: "What two numbers multiply to -225 and add up to -16?"

The answer to your question is:

-25 and 9


Below we illustrate and prove that -25 and 9 multiply to -225 and add up to -16:

-25 × 9 = -225
-25 + 9 = -16

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

x2 - 16x - 225 = 0

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

(x - 25 ) (x + 9)

To summarize, since -25 and 9 multiply to -225 and add up -16, you know that the following is true:

x2 - 16x - 225 = (x - 25 ) (x + 9)


Multiply To One Number and Add Up To Another
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