What two numbers multiply to 4 and add up to 4?

Here we answer the question: "What two numbers multiply to 4 and add up to 4?"

The answer to your question is:

2 and 2

Below we illustrate and prove that 2 and 2 multiply to 4 and add up to 4:

2 × 2 = 4
2 + 2 = 4

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

x² + 4x + 4 = 0

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

(x + 2 ) (x + 2)

To summarize, since 2 and 2 multiply to 4 and add up 4, you know that the following is true:

x² + 4x + 4 = (x + 2 ) (x + 2)

Multiply To One Number and Add Up To Another
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