What two numbers multiply to 324 and add up to 85?

Here we answer the question: "What two numbers multiply to 324 and add up to 85?"

The answer to your question is:

4 and 81

Below we illustrate and prove that 4 and 81 multiply to 324 and add up to 85:

4 × 81 = 324
4 + 81 = 85

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

x² + 85x + 324 = 0

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

(x + 4 ) (x + 81)

To summarize, since 4 and 81 multiply to 324 and add up 85, you know that the following is true:

x² + 85x + 324 = (x + 4 ) (x + 81)

Multiply To One Number and Add Up To Another
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