What two numbers multiply to 840 and add up to 71?

Here we answer the question: "What two numbers multiply to 840 and add up to 71?"

The answer to your question is:

15 and 56

Below we illustrate and prove that 15 and 56 multiply to 840 and add up to 71:

15 × 56 = 840
15 + 56 = 71

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

x² + 71x + 840 = 0

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

(x + 15 ) (x + 56)

To summarize, since 15 and 56 multiply to 840 and add up 71, you know that the following is true:

x² + 71x + 840 = (x + 15 ) (x + 56)

Multiply To One Number and Add Up To Another
Did you find the information on this page useful? Here you can solve a similar problem.