What two numbers multiply to 645 and add up to -646?

Here we answer the question: "What two numbers multiply to 645 and add up to -646?"

The answer to your question is:

-645 and -1

Below we illustrate and prove that -645 and -1 multiply to 645 and add up to -646:

-645 × -1 = 645
-645 + -1 = -646

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

x² - 646x + 645 = 0

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

(x - 645 ) (x - 1)

To summarize, since -645 and -1 multiply to 645 and add up -646, you know that the following is true:

x² - 646x + 645 = (x - 645 ) (x - 1)

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.