展开 (((scos(θ))-w(sin(θ))))/((s+a)(s^2+w^2))

解答

展开

\frac{( ( s cos ( θ ) ) - w ( sin ( θ ) ) )}{( s + a ) ( s ^{2} + w ^{2} )}

\frac{s cos ( θ ) - w sin ( θ )}{s ^{3} + s w ^{2} + a s ^{2} + a w ^{2}}

求解步骤

\frac{( s cos ( θ ) ) - w ( sin ( θ ) )}{( s + a ) ( s ^{2} + w ^{2} )}

去除括号:

(a) = a

= \frac{s cos ( θ ) - w sin ( θ )}{( s + a ) ( s ^{2} + w ^{2} )}

乘开

(s + a) (s^{2} + w^{2}) : s^{3} + s w^{2} + a s^{2} + a w^{2}

= \frac{s cos ( θ ) - w sin ( θ )}{s ^{3} + s w ^{2} + a s ^{2} + a w ^{2}}

e x p an d \frac{3 x ^{2} - 27 x ^{4}}{x ^{3}}

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

e x p an d \frac{x ( 3000 - 3 x )}{2}

e x p an d \frac{1}{( S ( S + 1 ) ( 0.2 S + 1 ) )}

e x p an d (9 y^{8} + 2 x^{7} y) d x - (8 x y^{7} + x^{8}) d y