What two numbers multiply to 54 and add up to -21?




Here we answer the question: "What two numbers multiply to 54 and add up to -21?"

The answer to your question is:

-18 and -3


Below we illustrate and prove that -18 and -3 multiply to 54 and add up to -21:

-18 × -3 = 54
-18 + -3 = -21

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

x2 - 21x + 54 = 0

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

(x - 18 ) (x - 3)

To summarize, since -18 and -3 multiply to 54 and add up -21, you know that the following is true:

x2 - 21x + 54 = (x - 18 ) (x - 3)


Multiply To One Number and Add Up To Another
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