What is (d^2)/(dx^2)(xsqrt(9-x)) ?

The answer to (d^2)/(dx^2)(xsqrt(9-x)) is (3x-36)/(4(9-x)sqrt(9-x))

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(d^2)/(dx^2)(xsqrt(9-x))

\frac{d ^{2}}{d x ^{2}} (x 9 - x)

\frac{3 x - 36}{4 ( 9 - x ) 9 - x}

Solution steps

\frac{d ^{2}}{d x ^{2}} (x 9 - x)

\frac{d}{d x} (x 9 - x) = \frac{- 3 x + 18}{2 9 - x}

= \frac{d}{d x} (\frac{- 3 x + 18}{2 9 - x})

\frac{d}{d x} (\frac{- 3 x + 18}{2 9 - x}) = \frac{3 x - 36}{4 ( 9 - x ) 9 - x}

= \frac{3 x - 36}{4 ( 9 - x ) 9 - x}

x \to 4 - lim (\frac{7}{x - 4})

\frac{\partial}{\partial x} (\frac{6}{x ^{4}})

y^{^{''}} + y = 3 sin (4 x)

f (x) = \frac{( x + 1 ) ( 2 x - 3 )}{2 x + 3}

y^{^{''}} + 2 y^{^{'}} - 3 y = - 16 x e^{x}

What is (d^2)/(dx^2)(xsqrt(9-x)) ?
The answer to (d^2)/(dx^2)(xsqrt(9-x)) is (3x-36)/(4(9-x)sqrt(9-x))