What two numbers multiply to 630 and add up to 51?

Here we answer the question: "What two numbers multiply to 630 and add up to 51?"

The answer to your question is:

21 and 30

Below we illustrate and prove that 21 and 30 multiply to 630 and add up to 51:

21 × 30 = 630
21 + 30 = 51

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

x² + 51x + 630 = 0

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

(x + 21 ) (x + 30)

To summarize, since 21 and 30 multiply to 630 and add up 51, you know that the following is true:

x² + 51x + 630 = (x + 21 ) (x + 30)

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.