What two numbers multiply to 240 and add up to -31?

Here we answer the question: "What two numbers multiply to 240 and add up to -31?"

The answer to your question is:

-16 and -15

Below we illustrate and prove that -16 and -15 multiply to 240 and add up to -31:

-16 × -15 = 240
-16 + -15 = -31

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

x² - 31x + 240 = 0

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

(x - 16 ) (x - 15)

To summarize, since -16 and -15 multiply to 240 and add up -31, you know that the following is true:

x² - 31x + 240 = (x - 16 ) (x - 15)

Multiply To One Number and Add Up To Another
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