展开 ((D+3)t+(D+1)t^2)/(D^2+1)

解答

展开

\frac{( D + 3 ) t + ( D + 1 ) t ^{2}}{D ^{2} + 1}

\frac{D t + 3 t + D t ^{2} + t ^{2}}{D ^{2} + 1}

求解步骤

\frac{( D + 3 ) t + ( D + 1 ) t ^{2}}{D ^{2} + 1}

乘开

(D + 3) t + (D + 1) t^{2} : D t + 3 t + D t^{2} + t^{2}

= \frac{D t + 3 t + D t ^{2} + t ^{2}}{D ^{2} + 1}

e x p an d (t - 7) H (t - 5)

e x p an d \frac{3 y ^{3} - x}{x ( x - y ^{3} )}

e x p an d p (3, 4) p (- 4, - 3)

e x p an d \frac{- s ^{3} + s - 2}{4 ( s ^{2} + 1 ) ^{2}}

e x p an d \frac{2 ( u - 1 ) ^{3}}{u}