Factor -x^2-4x

$- x^{2} - 4 x$

Step 1

Factor $- x$ out of $- x^{2}$ .

$- x (x) - 4 x$

Step 2

Factor $- x$ out of $- 4 x$ .

$- x (x) - x (4)$

Step 3

Factor $- x$ out of $- x (x) - x (4)$ .

$- x (x + 4)$

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