What two numbers multiply to -8 and add up to -7?




Here we answer the question: "What two numbers multiply to -8 and add up to -7?"

The answer to your question is:

-8 and 1


Below we illustrate and prove that -8 and 1 multiply to -8 and add up to -7:

-8 × 1 = -8
-8 + 1 = -7

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

x2 - 7x - 8 = 0

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

(x - 8 ) (x + 1)

To summarize, since -8 and 1 multiply to -8 and add up -7, you know that the following is true:

x2 - 7x - 8 = (x - 8 ) (x + 1)


Multiply To One Number and Add Up To Another
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