What two numbers multiply to -15 and add up to -2?




Here we answer the question: "What two numbers multiply to -15 and add up to -2?"

The answer to your question is:

-5 and 3


Below we illustrate and prove that -5 and 3 multiply to -15 and add up to -2:

-5 × 3 = -15
-5 + 3 = -2

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

x2 - 2x - 15 = 0

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

(x - 5 ) (x + 3)

To summarize, since -5 and 3 multiply to -15 and add up -2, you know that the following is true:

x2 - 2x - 15 = (x - 5 ) (x + 3)


Multiply To One Number and Add Up To Another
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