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:

15 and 16

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

15 × 16 = 240
15 + 16 = 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 + 15 ) (x + 16)

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

x² + 31x + 240 = (x + 15 ) (x + 16)

Multiply To One Number and Add Up To Another
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