What is expand (3x)/((1-x)(1+2x)) ?

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

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expand (3x)/((1-x)(1+2x))

expand

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

\frac{3 x}{1 + x - 2 x ^{2}}

Solution steps

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

Expand

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

= \frac{3 x}{1 + x - 2 x ^{2}}

C e^{2 x} + \frac{1}{4} (2 x^{2} + 2 x + 1)

(3 - a)^{2}

\frac{3 cos ( x )}{( 1 - sin ( x ) ) ^{2}}

(7 + e^{- 3 t})^{2}

\frac{d ^{2}}{d x ^{2}} ((y (x, s)) (c \cdot e^{2 x} + s \cdot x e^{2 x}))

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