What is (\partial)/(\partial y)(e^y(x^2-y^2)) ?

The answer to (\partial)/(\partial y)(e^y(x^2-y^2)) is e^y(x^2-y^2)-2e^yy

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(\partial)/(\partial y)(e^y(x^2-y^2))

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

e^{y} (x^{2} - y^{2}) - 2 e^{y} y

Solution steps

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

Treat

x

as a constant

Apply the Product Rule:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = e^{y}, g = x^{2} - y^{2}

= \frac{\partial}{\partial y} (e^{y}) (x^{2} - y^{2}) + \frac{\partial}{\partial y} (x^{2} - y^{2}) e^{y}

\frac{\partial}{\partial y} (e^{y}) = e^{y}

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

= e^{y} (x^{2} - y^{2}) + (- 2 y) e^{y}

Simplify

= e^{y} (x^{2} - y^{2}) - 2 e^{y} y

What is (\partial)/(\partial y)(e^y(x^2-y^2)) ?
The answer to (\partial)/(\partial y)(e^y(x^2-y^2)) is e^y(x^2-y^2)-2e^yy