What two numbers multiply to -900 and add up to 91?




Here we answer the question: "What two numbers multiply to -900 and add up to 91?"

The answer to your question is:

-9 and 100


Below we illustrate and prove that -9 and 100 multiply to -900 and add up to 91:

-9 × 100 = -900
-9 + 100 = 91

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

x2 + 91x - 900 = 0

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

(x - 9 ) (x + 100)

To summarize, since -9 and 100 multiply to -900 and add up 91, you know that the following is true:

x2 + 91x - 900 = (x - 9 ) (x + 100)


Multiply To One Number and Add Up To Another
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