What is expand Dxy(x^2+y^2=25) ?

The solution to expand Dxy(x^2+y^2=25) is Dx^3y+Dxy^3=25

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expand Dxy(x^2+y^2=25)

expand

D x y (x^{2} + y^{2} = 25)

D x^{3} y + D x y^{3} = 25

Solution steps

D x y (x^{2} + y^{2} = 25)

= D x y (x^{2} + 25 = y^{2})

Apply the distributive law:

a (b + c) = ab + a c

a = D x y, b = x^{2}, c = y^{2} = 25

D x y x^{2} + D x y y^{2} = 25

D x^{2} x y + D x y^{2} y = 25

Expand

D x^{2} x y + D x y^{2} y : D x^{3} y + D x y^{3}

D x^{3} y + D x y^{3} = 25

(y + y^{3}) d y

\frac{3 x - 3}{( x - 3 ) ^{2}}

(3 x - 2 y = 5,) - (x + 3 y = 9)

(x^{2} + 2 x) e^{2 x}

\frac{n}{( n + 1 ) ( n ! )}

What is expand Dxy(x^2+y^2=25) ?
The solution to expand Dxy(x^2+y^2=25) is Dx^3y+Dxy^3=25