What is the first derivative of-2xy ?

The first derivative of-2xy is -2y

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derivative of-2xy

derivative of

- 2 x y

- 2 y

Solution steps

\frac{d}{d x} (- 2 x y)

Treat

y

as a constant

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

= - 2 y \frac{d x}{d x}

Apply the common derivative:

\frac{d x}{d x} = 1

= - 2 y \cdot 1

Simplify

= - 2 y