What two numbers multiply to 36 and add up to 15?

Here we answer the question: "What two numbers multiply to 36 and add up to 15?"

The answer to your question is:

3 and 12

Below we illustrate and prove that 3 and 12 multiply to 36 and add up to 15:

3 × 12 = 36
3 + 12 = 15

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

x² + 15x + 36 = 0

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

(x + 3 ) (x + 12)

To summarize, since 3 and 12 multiply to 36 and add up 15, you know that the following is true:

x² + 15x + 36 = (x + 3 ) (x + 12)

Multiply To One Number and Add Up To Another
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