What is (\partial)/(\partial x)(9xy-4x^2y) ?

The answer to (\partial)/(\partial x)(9xy-4x^2y) is 9y-8yx

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(\partial)/(\partial x)(9xy-4x^2y)

\frac{\partial}{\partial x} (9 x y - 4 x^{2} y)

9 y - 8 y x

Solution steps

\frac{\partial}{\partial x} (9 x y - 4 x^{2} y)

Treat

y

as a constant

Apply the Sum/Difference Rule:

(f \pm g)^{'} = f^{'} \pm g^{'}

= \frac{\partial}{\partial x} (9 x y) - \frac{\partial}{\partial x} (4 x^{2} y)

\frac{\partial}{\partial x} (9 x y) = 9 y

\frac{\partial}{\partial x} (4 x^{2} y) = 8 y x

= 9 y - 8 y x

What is (\partial)/(\partial x)(9xy-4x^2y) ?
The answer to (\partial)/(\partial x)(9xy-4x^2y) is 9y-8yx