What two numbers multiply to -990 and add up to -51?




Here we answer the question: "What two numbers multiply to -990 and add up to -51?"

The answer to your question is:

-66 and 15


Below we illustrate and prove that -66 and 15 multiply to -990 and add up to -51:

-66 × 15 = -990
-66 + 15 = -51

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

x2 - 51x - 990 = 0

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

(x - 66 ) (x + 15)

To summarize, since -66 and 15 multiply to -990 and add up -51, you know that the following is true:

x2 - 51x - 990 = (x - 66 ) (x + 15)


Multiply To One Number and Add Up To Another
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