What two numbers multiply to -280 and add up to -18?




Here we answer the question: "What two numbers multiply to -280 and add up to -18?"

The answer to your question is:

-28 and 10


Below we illustrate and prove that -28 and 10 multiply to -280 and add up to -18:

-28 × 10 = -280
-28 + 10 = -18

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

x2 - 18x - 280 = 0

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

(x - 28 ) (x + 10)

To summarize, since -28 and 10 multiply to -280 and add up -18, you know that the following is true:

x2 - 18x - 280 = (x - 28 ) (x + 10)


Multiply To One Number and Add Up To Another
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