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:

-9 and 25


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

-9 × 25 = -225
-9 + 25 = 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 - 9 ) (x + 25)

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

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


Multiply To One Number and Add Up To Another
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