What is expand (2x)/((r+1)(r-1)) ?

The solution to expand (2x)/((r+1)(r-1)) is (2x)/(r^2-1)

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expand (2x)/((r+1)(r-1))

expand

\frac{2 x}{( r + 1 ) ( r - 1 )}

\frac{2 x}{r ^{2} - 1}

Solution steps

\frac{2 x}{( r + 1 ) ( r - 1 )}

Expand

(r + 1) (r - 1) : r^{2} - 1

= \frac{2 x}{r ^{2} - 1}

\frac{s ^{2} + s + 1}{( s ^{2} + 1 ) ^{2}}

- \frac{2 e ^{2}}{( 1 + e ^{2} ) ^{2}}

s (s^{2} + 5 s + 5)^{2}

\frac{1}{4 + 9 x ^{2}}

\frac{( 4 s + 5 )}{( ( s + 3 ) ( s - 4 ) ^{2} )}

What is expand (2x)/((r+1)(r-1)) ?
The solution to expand (2x)/((r+1)(r-1)) is (2x)/(r^2-1)