What two numbers multiply to 56 and add up to 15?

Here we answer the question: "What two numbers multiply to 56 and add up to 15?"

The answer to your question is:

7 and 8

Below we illustrate and prove that 7 and 8 multiply to 56 and add up to 15:

7 × 8 = 56
7 + 8 = 15

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

x² + 15x + 56 = 0

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

(x + 7 ) (x + 8)

To summarize, since 7 and 8 multiply to 56 and add up 15, you know that the following is true:

x² + 15x + 56 = (x + 7 ) (x + 8)

Multiply To One Number and Add Up To Another
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