What two numbers multiply to -990 and add up to -89?




Here we answer the question: "What two numbers multiply to -990 and add up to -89?"

The answer to your question is:

-99 and 10


Below we illustrate and prove that -99 and 10 multiply to -990 and add up to -89:

-99 × 10 = -990
-99 + 10 = -89

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

x2 - 89x - 990 = 0

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

(x - 99 ) (x + 10)

To summarize, since -99 and 10 multiply to -990 and add up -89, you know that the following is true:

x2 - 89x - 990 = (x - 99 ) (x + 10)


Multiply To One Number and Add Up To Another
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