What is expand (dx)/((9+x^2)^2) ?

The solution to expand (dx)/((9+x^2)^2) is (dx)/(81+18x^2+x^4)

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expand (dx)/((9+x^2)^2)

expand

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

\frac{d x}{81 + 18 x ^{2} + x ^{4}}

Solution steps

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

(9 + x^{2})^{2} = 81 + 18 x^{2} + x^{4}

= \frac{d x}{81 + 18 x ^{2} + x ^{4}}

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What is expand (dx)/((9+x^2)^2) ?
The solution to expand (dx)/((9+x^2)^2) is (dx)/(81+18x^2+x^4)