What two numbers multiply to 840 and add up to 61?




Here we answer the question: "What two numbers multiply to 840 and add up to 61?"

The answer to your question is:

21 and 40


Below we illustrate and prove that 21 and 40 multiply to 840 and add up to 61:

21 × 40 = 840
21 + 40 = 61

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

x2 + 61x + 840 = 0

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

(x + 21 ) (x + 40)

To summarize, since 21 and 40 multiply to 840 and add up 61, you know that the following is true:

x2 + 61x + 840 = (x + 21 ) (x + 40)


Multiply To One Number and Add Up To Another
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