What two numbers multiply to 518 and add up to 81?




Here we answer the question: "What two numbers multiply to 518 and add up to 81?"

The answer to your question is:

7 and 74


Below we illustrate and prove that 7 and 74 multiply to 518 and add up to 81:

7 × 74 = 518
7 + 74 = 81

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

x2 + 81x + 518 = 0

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

(x + 7 ) (x + 74)

To summarize, since 7 and 74 multiply to 518 and add up 81, you know that the following is true:

x2 + 81x + 518 = (x + 7 ) (x + 74)


Multiply To One Number and Add Up To Another
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