What is expand (x^2-x-21)/((x^2+4)(2x-1)) ?

The solution to expand (x^2-x-21)/((x^2+4)(2x-1)) is (x^2-x-21)/(2x^3-x^2+8x-4)

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expand (x^2-x-21)/((x^2+4)(2x-1))

expand

\frac{x ^{2} - x - 21}{( x ^{2} + 4 ) ( 2 x - 1 )}

\frac{x ^{2} - x - 21}{2 x ^{3} - x ^{2} + 8 x - 4}

Solution steps

\frac{x ^{2} - x - 21}{( x ^{2} + 4 ) ( 2 x - 1 )}

Expand

(x^{2} + 4) (2 x - 1) : 2 x^{3} - x^{2} + 8 x - 4

= \frac{x ^{2} - x - 21}{2 x ^{3} - x ^{2} + 8 x - 4}

\frac{x ^{2} ( x ^{2} - 12 )}{( x ^{2} - 4 ) ^{2}}

(x + 2 y)^{2}

\frac{1}{5} - \frac{2}{125} (6.1 - 6)

(5 x^{4} + 11 x^{2} y - 8 y^{2} + 3) l e f t (3 x y^{2})

(5 - x 6)^{2}

What is expand (x^2-x-21)/((x^2+4)(2x-1)) ?
The solution to expand (x^2-x-21)/((x^2+4)(2x-1)) is (x^2-x-21)/(2x^3-x^2+8x-4)