展开 (2x-1)/(x^2(x^2+4))

解答

展开

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

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

求解步骤

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

乘开

x^{2} (x^{2} + 4) : x^{4} + 4 x^{2}

= \frac{2 x - 1}{x ^{4} + 4 x ^{2}}

e x p an d \frac{2 x ^{4} - 6 x ^{2} + 12}{( x + 1 ) ( x - 1 )}

e x p an d \frac{d}{d x} (3 x cos (2 x)) + (3 x^{2} - 5) sin (2 x)

e x p an d A (- 4, - 2) y B (5, 3)

e x p an d \frac{4 m n ^{2} + p n ^{2}}{32 km + 8 k p}

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