What two numbers multiply to 81 and add up to 30?

Here we answer the question: "What two numbers multiply to 81 and add up to 30?"

The answer to your question is:

3 and 27

Below we illustrate and prove that 3 and 27 multiply to 81 and add up to 30:

3 × 27 = 81
3 + 27 = 30

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

x² + 30x + 81 = 0

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

(x + 3 ) (x + 27)

To summarize, since 3 and 27 multiply to 81 and add up 30, you know that the following is true:

x² + 30x + 81 = (x + 3 ) (x + 27)

Multiply To One Number and Add Up To Another
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