What two numbers multiply to 405 and add up to 138?

Here we answer the question: "What two numbers multiply to 405 and add up to 138?"

The answer to your question is:

3 and 135

Below we illustrate and prove that 3 and 135 multiply to 405 and add up to 138:

3 × 135 = 405
3 + 135 = 138

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

x² + 138x + 405 = 0

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

(x + 3 ) (x + 135)

To summarize, since 3 and 135 multiply to 405 and add up 138, you know that the following is true:

x² + 138x + 405 = (x + 3 ) (x + 135)

Multiply To One Number and Add Up To Another
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