What two numbers multiply to -81 and add up to 80?




Here we answer the question: "What two numbers multiply to -81 and add up to 80?"

The answer to your question is:

-1 and 81


Below we illustrate and prove that -1 and 81 multiply to -81 and add up to 80:

-1 × 81 = -81
-1 + 81 = 80

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

x2 + 80x - 81 = 0

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

(x - 1 ) (x + 81)

To summarize, since -1 and 81 multiply to -81 and add up 80, you know that the following is true:

x2 + 80x - 81 = (x - 1 ) (x + 81)


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.

What two numbers multiply to and add to

What two numbers multiply to -80 and add up to -79?
Here is the next math problem on our list that we have solved for you.






Copyright  |   Privacy Policy  |   Disclaimer  |   Contact