展开 (2(x^2-1))/(x^2-3)

解答

展开

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

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

求解步骤

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

乘开

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

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

e x p an d \frac{4 a x}{( x + a ) ^{2} ( x - a ) ^{2}}

e x p an d \frac{( x - 7 ) ^{2} ( m x - 7 m )}{( x - 7 ) ^{3} + ( m x - 7 m ) ^{2}}

\frac{d}{d t} ((r (t, y, x)) (y + x cos (t)))

e x p an d \frac{9}{x ( x + 6 )}

e x p an d \frac{( 5 x - 5 )}{5} \cdot \frac{( x + 10 )}{( x - 1 )}